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network: drop list of static addresses
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
518cd6b5 6#include <linux/if_link.h>
4cc7a82c 7#include <unistd.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
737f1405
YW		 10#include "bond.h"
11#include "bridge.h"
1346b1f0 12#include "bus-util.h"
27dfc982 13#include "dhcp-identifier.h"
bd91b83e 14#include "dhcp-lease-internal.h"
686d13b9 15#include "env-file.h"
4bb7cc82 16#include "ethtool-util.h"
3ffd4af2 17#include "fd-util.h"
cf1d700d 18#include "fileio.h"
737f1405 19#include "ipvlan.h"
ef118d00 20#include "missing_network.h"
cf1d700d 21#include "netlink-util.h"
c6f7c917 22#include "network-internal.h"
fb486c90 23#include "networkd-address-label.h"
3ddcbeea 24#include "networkd-can.h"
8fcf1d61 25#include "networkd-dhcp-server.h"
ca5ad760
YW		 26#include "networkd-dhcp4.h"
27#include "networkd-dhcp6.h"
ee446d57 28#include "networkd-fdb.h"
ca5ad760 29#include "networkd-ipv4ll.h"
a0e5c15d 30#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 31#include "networkd-link-bus.h"
32#include "networkd-link.h"
8e1ad1ea 33#include "networkd-lldp-tx.h"
23f53b99 34#include "networkd-manager.h"
dbf63196 35#include "networkd-mdb.h"
1e7a0e21 36#include "networkd-ndisc.h"
e4a71bf3 37#include "networkd-neighbor.h"
75156ccb 38#include "networkd-nexthop.h"
518cd6b5 39#include "networkd-sriov.h"
7465dd22 40#include "networkd-radv.h"
bce67bbe 41#include "networkd-routing-policy-rule.h"
8d968fdd 42#include "networkd-wifi.h"
cf1d700d
TG		 43#include "set.h"
44#include "socket-util.h"
bf331d87 45#include "stat-util.h"
15a5e950 46#include "stdio-util.h"
8b43440b 47#include "string-table.h"
51517f9e 48#include "strv.h"
62e021a9 49#include "sysctl-util.h"
34658df2 50#include "tc.h"
e4de7287 51#include "tmpfile-util.h"
299ad32d 52#include "udev-util.h"
cf1d700d 53#include "util.h"
737f1405 54#include "vrf.h"
fc2f9534 55
bdb9f580
YW		 56uint32_t link_get_vrf_table(Link *link) {
57 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
58}
59
60uint32_t link_get_dhcp_route_table(Link *link) {
61 /* When the interface is part of an VRF use the VRFs routing table, unless
62 * another table is explicitly specified. */
63 if (link->network->dhcp_route_table_set)
64 return link->network->dhcp_route_table;
65 return link_get_vrf_table(link);
66}
67
68uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
69 if (link->network->ipv6_accept_ra_route_table_set)
70 return link->network->ipv6_accept_ra_route_table;
71 return link_get_vrf_table(link);
72}
73
f24648a6
YW		 74DUID* link_get_duid(Link *link) {
75 if (link->network->duid.type != _DUID_TYPE_INVALID)
76 return &link->network->duid;
77 else
78 return &link->manager->duid;
79}
80
b9d74c40
LP		 81static bool link_dhcp6_enabled(Link *link) {
82 assert(link);
83
fa709992
LP		 84 if (!socket_ipv6_is_supported())
85 return false;
86
78c958f8
TG		 87 if (link->flags & IFF_LOOPBACK)
88 return false;
89
90 if (!link->network)
91 return false;
92
f2bfcdb9
YW		 93 if (link->network->bond)
94 return false;
95
500b96eb 96 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 97 return false;
98
e0ee46f2 99 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 100}
101
b9d74c40
LP		 102static bool link_dhcp4_enabled(Link *link) {
103 assert(link);
104
78c958f8
TG		 105 if (link->flags & IFF_LOOPBACK)
106 return false;
107
108 if (!link->network)
109 return false;
110
f2bfcdb9
YW		 111 if (link->network->bond)
112 return false;
113
500b96eb 114 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 115 return false;
116
e0ee46f2 117 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 118}
119
b9d74c40
LP		 120static bool link_dhcp4_server_enabled(Link *link) {
121 assert(link);
122
78c958f8
TG		 123 if (link->flags & IFF_LOOPBACK)
124 return false;
125
126 if (!link->network)
127 return false;
128
f2bfcdb9
YW		 129 if (link->network->bond)
130 return false;
131
500b96eb 132 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 133 return false;
134
78c958f8
TG		 135 return link->network->dhcp_server;
136}
137
2d792895 138bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 139 assert(link);
910feb78 140 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 141
78c958f8
TG		 142 if (link->flags & IFF_LOOPBACK)
143 return false;
144
145 if (!link->network)
146 return false;
147
500b96eb 148 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 149 return false;
150
98d20a17 151 if (STRPTR_IN_SET(link->kind,
152 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 153 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 154 return false;
155
f410d463
YW		 156 /* L3 or L3S mode do not support ARP. */
157 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
158 return false;
159
f2bfcdb9
YW		 160 if (link->network->bond)
161 return false;
162
910feb78 163 return link->network->link_local & mask;
8bc17bb3
SS		 164}
165
f8f2f880 166bool link_ipv6ll_enabled(Link *link) {
b9d74c40
LP		 167 assert(link);
168
fa709992
LP		 169 if (!socket_ipv6_is_supported())
170 return false;
171
d0d6a4cd
TG		 172 if (link->flags & IFF_LOOPBACK)
173 return false;
174
175 if (!link->network)
176 return false;
177
500b96eb 178 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 179 return false;
180
181 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 182 return false;
183
f2bfcdb9
YW		 184 if (link->network->bond)
185 return false;
186
e0ee46f2 187 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 188}
189
439689c6
SS		 190static bool link_ipv6_enabled(Link *link) {
191 assert(link);
192
193 if (!socket_ipv6_is_supported())
194 return false;
195
b102cdca 196 if (link->network->bond)
2b00a4e0
TY		 197 return false;
198
500b96eb 199 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 200 return false;
201
4cef7fe3 202 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 203 if (link_ipv6ll_enabled(link))
204 return true;
205
206 if (network_has_static_ipv6_configurations(link->network))
207 return true;
208
209 return false;
439689c6
SS		 210}
211
7465dd22
PF		 212static bool link_radv_enabled(Link *link) {
213 assert(link);
214
215 if (!link_ipv6ll_enabled(link))
216 return false;
217
55a7c78b 218 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 219}
220
769d324c 221static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 222 assert(link);
223
5a8bcb67
LP		 224 if (link->flags & IFF_LOOPBACK)
225 return false;
226
227 if (!link->network)
228 return false;
229
2d792895 230 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 231 return false;
232
e0ee46f2 233 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 234}
235
236static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 237 assert(link);
765afd5c
LP		 238
239 if (!socket_ipv6_is_supported())
240 return false;
241
769d324c
LP		 242 if (link->flags & IFF_LOOPBACK)
243 return false;
244
245 if (!link->network)
246 return false;
247
2d792895 248 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 249 return false;
250
e0ee46f2 251 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 252}
253
23d8b221
SS		 254static bool link_proxy_arp_enabled(Link *link) {
255 assert(link);
256
257 if (link->flags & IFF_LOOPBACK)
258 return false;
259
260 if (!link->network)
261 return false;
262
263 if (link->network->proxy_arp < 0)
264 return false;
265
266 return true;
267}
268
b9d74c40
LP		 269static bool link_ipv6_accept_ra_enabled(Link *link) {
270 assert(link);
271
fa709992
LP		 272 if (!socket_ipv6_is_supported())
273 return false;
274
f5a8c43f
TG		 275 if (link->flags & IFF_LOOPBACK)
276 return false;
277
278 if (!link->network)
279 return false;
280
702c979f
SS		 281 if (!link_ipv6ll_enabled(link))
282 return false;
283
f5a8c43f
TG		 284 /* If unset use system default (enabled if local forwarding is disabled.
285 * disabled if local forwarding is enabled).
286 * If set, ignore or enforce RA independent of local forwarding state.
287 */
288 if (link->network->ipv6_accept_ra < 0)
289 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
290 return !link_ipv6_forward_enabled(link);
291 else if (link->network->ipv6_accept_ra > 0)
292 /* accept RA even if ip_forward is enabled */
293 return true;
294 else
295 /* ignore RA */
296 return false;
297}
298
1f0d9695 299static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 300 assert(link);
d68e2e59
LP		 301
302 if (!socket_ipv6_is_supported())
303 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
304
49092e22 305 if (link->flags & IFF_LOOPBACK)
1f0d9695 306 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 307
308 if (!link->network)
1f0d9695 309 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 310
311 return link->network->ipv6_privacy_extensions;
312}
313
57ad7607 314static int link_update_ipv6_sysctl(Link *link) {
482efedc 315 bool enabled;
439689c6
SS		 316 int r;
317
318 if (link->flags & IFF_LOOPBACK)
319 return 0;
320
482efedc
SS		 321 enabled = link_ipv6_enabled(link);
322 if (enabled) {
323 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
324 if (r < 0)
57ad7607
ZJS		 325 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
326
327 log_link_info(link, "IPv6 successfully enabled");
482efedc 328 }
439689c6
SS		 329
330 return 0;
331}
332
34bf3c00
YW		 333static bool link_is_enslaved(Link *link) {
334 if (link->flags & IFF_SLAVE)
335 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
336 return true;
337
34bf3c00
YW		 338 if (!link->network)
339 return false;
340
bb262ef0 341 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 342 return true;
343
bb262ef0
YW		 344 /* TODO: add conditions for other netdevs. */
345
34bf3c00
YW		 346 return false;
347}
348
45e11abf
YW		 349static void link_update_master_operstate(Link *link, NetDev *netdev) {
350 Link *master;
351
352 if (!netdev)
353 return;
354
7936917e
YW		 355 if (netdev->ifindex <= 0)
356 return;
357
45e11abf
YW		 358 if (link_get(link->manager, netdev->ifindex, &master) < 0)
359 return;
360
361 link_update_operstate(master, true);
362}
363
364void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 365 LinkOperationalState operstate;
1678fbb3
YW		 366 LinkCarrierState carrier_state;
367 LinkAddressState address_state;
35c5a9ca 368 _cleanup_strv_free_ char **p = NULL;
1678fbb3 369 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 370 bool changed = false;
1678fbb3 371 Address *address;
14153d1b 372
84de38c5
TG		 373 assert(link);
374
375 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 376 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 377 else if (link_has_carrier(link)) {
1678fbb3
YW		 378 if (link_is_enslaved(link))
379 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 380 else
1678fbb3 381 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 382 } else if (link->flags & IFF_UP)
1678fbb3 383 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 384 else
1678fbb3 385 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 386
1678fbb3 387 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 388 Link *slave;
389
90e74a66 390 SET_FOREACH(slave, link->slaves) {
959f65d3 391 link_update_operstate(slave, false);
84de38c5 392
1678fbb3
YW		 393 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
394 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 395 }
959f65d3 396 }
84de38c5 397
90e74a66 398 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 399 if (!address_is_ready(address))
400 continue;
84de38c5 401
1678fbb3
YW		 402 if (address->scope < scope)
403 scope = address->scope;
404 }
84de38c5 405
1678fbb3 406 /* for operstate we also take foreign addresses into account */
90e74a66 407 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 408 if (!address_is_ready(address))
409 continue;
410
411 if (address->scope < scope)
412 scope = address->scope;
413 }
414
415 if (scope < RT_SCOPE_SITE)
416 /* universally accessible addresses found */
417 address_state = LINK_ADDRESS_STATE_ROUTABLE;
418 else if (scope < RT_SCOPE_HOST)
419 /* only link or site local addresses found */
420 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 421 else
1678fbb3
YW		 422 /* no useful addresses found */
423 address_state = LINK_ADDRESS_STATE_OFF;
424
425 /* Mapping of address and carrier state vs operational state
426 * carrier state
427 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
428 * ------------------------------------------------------------------------------
429 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
430 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
431 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
432 */
84de38c5 433
1678fbb3
YW		 434 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
435 operstate = (LinkOperationalState) carrier_state;
436 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
437 operstate = LINK_OPERSTATE_ROUTABLE;
438 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
439 operstate = LINK_OPERSTATE_DEGRADED;
440 else
14153d1b
YW		 441 operstate = LINK_OPERSTATE_ENSLAVED;
442
35c5a9ca
YW		 443 if (link->carrier_state != carrier_state) {
444 link->carrier_state = carrier_state;
445 changed = true;
446 if (strv_extend(&p, "CarrierState") < 0)
447 log_oom();
448 }
959f65d3 449
35c5a9ca
YW		 450 if (link->address_state != address_state) {
451 link->address_state = address_state;
452 changed = true;
453 if (strv_extend(&p, "AddressState") < 0)
454 log_oom();
959f65d3
YW		 455 }
456
84de38c5
TG		 457 if (link->operstate != operstate) {
458 link->operstate = operstate;
35c5a9ca
YW		 459 changed = true;
460 if (strv_extend(&p, "OperationalState") < 0)
461 log_oom();
84de38c5 462 }
959f65d3 463
35c5a9ca
YW		 464 if (p)
465 link_send_changed_strv(link, p);
466 if (changed)
467 link_dirty(link);
468
45e11abf
YW		 469 if (also_update_master && link->network) {
470 link_update_master_operstate(link, link->network->bond);
471 link_update_master_operstate(link, link->network->bridge);
959f65d3 472 }
84de38c5
TG		 473}
474
51d18171
TG		 475#define FLAG_STRING(string, flag, old, new) \
476 (((old ^ new) & flag) \
477 ? ((old & flag) ? (" -" string) : (" +" string)) \
478 : "")
479
bb262ef0 480static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 481 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
482 uint8_t operstate;
483 int r;
484
485 assert(link);
486
487 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 488 if (r < 0)
489 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 490
1c4baffc 491 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 492 if (r < 0)
493 /* if we got a message without operstate, take it to mean
494 the state was unchanged */
495 operstate = link->kernel_operstate;
496
bb262ef0 497 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 498 return 0;
499
500 if (link->flags != flags) {
6a7a4e4d 501 log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
51d18171
TG		 502 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
503 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
504 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
505 FLAG_STRING("UP", IFF_UP, link->flags, flags),
506 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
507 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
508 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
509 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
510 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
511 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
512 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
513 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
514 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
515 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
516 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
517 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
518 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
519 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
520 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
521
522 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
523 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
524 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
525 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
526 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
527 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
528 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
529 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
530
531 /* link flags are currently at most 18 bits, let's align to
532 * printing 20 */
533 if (unknown_flags_added)
79008bdd 534 log_link_debug(link,
6a7a4e4d 535 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 536 unknown_flags_added);
537
538 if (unknown_flags_removed)
79008bdd 539 log_link_debug(link,
6a7a4e4d 540 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 541 unknown_flags_removed);
542 }
543
544 link->flags = flags;
545 link->kernel_operstate = operstate;
546
959f65d3 547 link_update_operstate(link, true);
51d18171
TG		 548
549 return 0;
550}
551
1c4baffc 552static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 553 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 554 const char *ifname, *kind = NULL;
b710e6b6 555 unsigned short iftype;
572b21d9
YW		 556 int r, ifindex;
557 uint16_t type;
f579559b 558
0c2f9b84 559 assert(manager);
505f8da7 560 assert(message);
f579559b
TG		 561 assert(ret);
562
6cad256d
TJ		 563 /* check for link kind */
564 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
565 if (r == 0) {
db2f8a2e 566 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 567 r = sd_netlink_message_exit_container(message);
568 if (r < 0)
569 return r;
570 }
571
1c4baffc 572 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 573 if (r < 0)
574 return r;
575 else if (type != RTM_NEWLINK)
576 return -EINVAL;
577
578 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
579 if (r < 0)
580 return r;
581 else if (ifindex <= 0)
582 return -EINVAL;
583
b710e6b6
LP		 584 r = sd_rtnl_message_link_get_type(message, &iftype);
585 if (r < 0)
586 return r;
587
1c4baffc 588 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 589 if (r < 0)
590 return r;
591
17f9c355 592 link = new(Link, 1);
f579559b
TG		 593 if (!link)
594 return -ENOMEM;
595
17f9c355
YW		 596 *link = (Link) {
597 .n_ref = 1,
598 .manager = manager,
599 .state = LINK_STATE_PENDING,
17f9c355
YW		 600 .ifindex = ifindex,
601 .iftype = iftype,
15761549
YW		 602
603 .n_dns = (unsigned) -1,
604 .dns_default_route = -1,
605 .llmnr = _RESOLVE_SUPPORT_INVALID,
606 .mdns = _RESOLVE_SUPPORT_INVALID,
607 .dnssec_mode = _DNSSEC_MODE_INVALID,
608 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 609 };
610
505f8da7
TG		 611 link->ifname = strdup(ifname);
612 if (!link->ifname)
613 return -ENOMEM;
f579559b 614
6cad256d
TJ		 615 if (kind) {
616 link->kind = strdup(kind);
617 if (!link->kind)
618 return -ENOMEM;
619 }
620
cbff7170
TJ		 621 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
622 if (r < 0)
623 log_link_debug_errno(link, r, "New device has no master, continuing without");
624
1c4baffc 625 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 626 if (r < 0)
34437b4f 627 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 628
c643bda5 629 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 630 if (r < 0)
631 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
632
c643bda5
YW		 633 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
634 if (r < 0)
635 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
636
572b21d9
YW		 637 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
638 if (r < 0 && r != -ENODATA)
639 return r;
640
34437b4f 641 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 642 return -ENOMEM;
fe8db0c5 643
34437b4f 644 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 645 return -ENOMEM;
646
34437b4f 647 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 648 return -ENOMEM;
649
d5099efc 650 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 651 if (r < 0)
652 return r;
653
654 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 655 if (r < 0)
656 return r;
657
bb262ef0 658 r = link_update_flags(link, message, false);
51d18171
TG		 659 if (r < 0)
660 return r;
661
1cc6c93a 662 *ret = TAKE_PTR(link);
f579559b
TG		 663
664 return 0;
665}
666
15761549
YW		 667void link_ntp_settings_clear(Link *link) {
668 link->ntp = strv_free(link->ntp);
669}
670
671void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 672 if (link->n_dns != (unsigned) -1)
673 for (unsigned i = 0; i < link->n_dns; i++)
674 in_addr_full_free(link->dns[i]);
15761549
YW		 675 link->dns = mfree(link->dns);
676 link->n_dns = (unsigned) -1;
677
678 link->search_domains = ordered_set_free_free(link->search_domains);
679 link->route_domains = ordered_set_free_free(link->route_domains);
680
681 link->dns_default_route = -1;
682 link->llmnr = _RESOLVE_SUPPORT_INVALID;
683 link->mdns = _RESOLVE_SUPPORT_INVALID;
684 link->dnssec_mode = _DNSSEC_MODE_INVALID;
685 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
686
687 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
688}
689
1a6bb31f
YW		 690static void link_free_engines(Link *link) {
691 if (!link)
692 return;
693
694 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
695 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
696 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1a6bb31f
YW		 697
698 link->lldp = sd_lldp_unref(link->lldp);
699
700 ndisc_flush(link);
701
702 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
703 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 704 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 705 link->ndisc = sd_ndisc_unref(link->ndisc);
706 link->radv = sd_radv_unref(link->radv);
707}
708
8301aa0b 709static Link *link_free(Link *link) {
428fd0a7
TG		 710 Address *address;
711
8301aa0b 712 assert(link);
f579559b 713
15761549
YW		 714 link_ntp_settings_clear(link);
715 link_dns_settings_clear(link);
716
8eec0b9d
YW		 717 link->routes = set_free(link->routes);
718 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 719 link->dhcp_routes = set_free(link->dhcp_routes);
720 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 721 link->dhcp6_routes = set_free(link->dhcp6_routes);
722 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
723 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
724 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 725 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 726
8eec0b9d
YW		 727 link->nexthops = set_free(link->nexthops);
728 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 729
8eec0b9d
YW		 730 link->neighbors = set_free(link->neighbors);
731 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 732
8eec0b9d
YW		 733 link->addresses = set_free(link->addresses);
734 link->addresses_foreign = set_free(link->addresses_foreign);
e5526518 735 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 736 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
737 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
738 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
739 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 740 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 741
11bf3cce
LP		 742 while ((address = link->pool_addresses)) {
743 LIST_REMOVE(addresses, link->pool_addresses, address);
744 address_free(address);
745 }
746
7272b25e 747 link_lldp_emit_stop(link);
1a6bb31f 748 link_free_engines(link);
68a8723c 749 free(link->lease_file);
49699bac
SS		 750 free(link->lldp_file);
751
c166a070 752 free(link->ifname);
572b21d9 753 strv_free(link->alternative_names);
ceac4078 754 free(link->kind);
8d968fdd 755 free(link->ssid);
c643bda5 756 free(link->driver);
6cad256d 757
db2f8a2e 758 (void) unlink(link->state_file);
fe8db0c5 759 free(link->state_file);
c166a070 760
51517f9e 761 sd_device_unref(link->sd_device);
b5db00e5 762
0d4ad91d 763 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 764 hashmap_free(link->bound_by_links);
765
5f707e12 766 set_free_with_destructor(link->slaves, link_unref);
033295c1 767
c9c908a6
YW		 768 network_unref(link->network);
769
8301aa0b 770 return mfree(link);
14b746f7
TG		 771}
772
8301aa0b 773DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 774
11a7f229
TG		 775int link_get(Manager *m, int ifindex, Link **ret) {
776 Link *link;
11a7f229
TG		 777
778 assert(m);
e856ed00 779 assert(ifindex > 0);
11a7f229
TG		 780 assert(ret);
781
ae06ab10 782 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 783 if (!link)
784 return -ENODEV;
785
786 *ret = link;
787
788 return 0;
789}
790
af9ba57a 791void link_set_state(Link *link, LinkState state) {
e331e246
TG		 792 assert(link);
793
794 if (link->state == state)
795 return;
796
0beb9542
YW		 797 log_link_debug(link, "State changed: %s -> %s",
798 link_state_to_string(link->state),
799 link_state_to_string(state));
800
e331e246
TG		 801 link->state = state;
802
803 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 804}
805
57bd6899
TG		 806static void link_enter_unmanaged(Link *link) {
807 assert(link);
808
e331e246 809 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 810
84de38c5 811 link_dirty(link);
57bd6899
TG		 812}
813
95355a28 814int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 815 int r = 0, k;
816
817 assert(link);
818 assert(link->manager);
819 assert(link->manager->event);
820
80060352
ZJS		 821 bool keep_dhcp = may_keep_dhcp &&
822 link->network &&
823 (link->manager->restarting ||
824 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
825
826 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 827 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 828 if (k < 0)
36c7d709 829 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 830 }
831
ba179154 832 if (link->ipv4ll) {
111bb8f9 833 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 834 if (k < 0)
36c7d709 835 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 836 }
837
2488e4d9
YW		 838 k = link_stop_ipv4_dad(link);
839 if (k < 0)
840 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 841
f5a8c43f
TG		 842 if (link->dhcp6_client) {
843 k = sd_dhcp6_client_stop(link->dhcp6_client);
844 if (k < 0)
36c7d709 845 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 846 }
4138fb2c 847
1633c457
YW		 848 if (link_dhcp6_pd_is_enabled(link)) {
849 k = dhcp6_pd_remove(link);
850 if (k < 0)
851 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
852 }
853
1e7a0e21
LP		 854 if (link->ndisc) {
855 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 856 if (k < 0)
36c7d709 857 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 858 }
859
7465dd22 860 if (link->radv) {
290696e5 861 k = sd_radv_stop(link->radv);
7465dd22
PF		 862 if (k < 0)
863 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
864 }
865
7272b25e 866 link_lldp_emit_stop(link);
111bb8f9
TG		 867 return r;
868}
869
b22d8a00 870void link_enter_failed(Link *link) {
ef1ba606 871 assert(link);
f882c247 872
370e9930 873 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 874 return;
875
6a7a4e4d 876 log_link_warning(link, "Failed");
449f7554 877
e331e246 878 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 879
95355a28 880 link_stop_clients(link, false);
111bb8f9 881
84de38c5 882 link_dirty(link);
f882c247
TG		 883}
884
7033af49
YW		 885static int link_join_netdevs_after_configured(Link *link) {
886 NetDev *netdev;
7033af49
YW		 887 int r;
888
90e74a66 889 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 890 if (netdev->ifindex > 0)
891 /* Assume already enslaved. */
892 continue;
893
894 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
895 continue;
896
897 log_struct(LOG_DEBUG,
898 LOG_LINK_INTERFACE(link),
899 LOG_NETDEV_INTERFACE(netdev),
900 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
901
902 r = netdev_join(netdev, link, NULL);
903 if (r < 0)
904 return log_struct_errno(LOG_WARNING, r,
905 LOG_LINK_INTERFACE(link),
906 LOG_NETDEV_INTERFACE(netdev),
907 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
908 }
909
910 return 0;
911}
912
e3a7b048 913static void link_enter_configured(Link *link) {
dd43110f
TG		 914 assert(link);
915 assert(link->network);
e3a7b048 916
289e6774 917 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 918 return;
dd43110f 919
e331e246 920 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 921
7033af49
YW		 922 (void) link_join_netdevs_after_configured(link);
923
84de38c5 924 link_dirty(link);
dd43110f
TG		 925}
926
6accfd31
DA		 927void link_check_ready(Link *link) {
928 Address *a;
6accfd31
DA		 929
930 assert(link);
931
5f58af25
YW		 932 if (link->state == LINK_STATE_CONFIGURED)
933 return;
934
935 if (link->state != LINK_STATE_CONFIGURING) {
936 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 937 return;
39373cb9 938 }
6accfd31
DA		 939
940 if (!link->network)
941 return;
942
39373cb9
YW		 943 if (!link->addresses_configured) {
944 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 945 return;
39373cb9 946 }
6accfd31 947
39373cb9
YW		 948 if (!link->neighbors_configured) {
949 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 950 return;
39373cb9 951 }
6accfd31 952
90e74a66 953 SET_FOREACH(a, link->addresses)
39373cb9
YW		 954 if (!address_is_ready(a)) {
955 _cleanup_free_ char *str = NULL;
956
957 (void) in_addr_to_string(a->family, &a->in_addr, &str);
958 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 959 return;
39373cb9 960 }
6aa5773b 961
39373cb9
YW		 962 if (!link->static_routes_configured) {
963 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 964 return;
39373cb9 965 }
6accfd31 966
39373cb9
YW		 967 if (!link->static_nexthops_configured) {
968 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 969 return;
39373cb9 970 }
c16c7808 971
39373cb9
YW		 972 if (!link->routing_policy_rules_configured) {
973 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 974 return;
39373cb9 975 }
6accfd31 976
39373cb9
YW		 977 if (!link->tc_configured) {
978 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 979 return;
39373cb9 980 }
4ecdcb07 981
39373cb9
YW		 982 if (!link->sr_iov_configured) {
983 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 984 return;
39373cb9 985 }
518cd6b5 986
1f241589
YW		 987 if (!link->bridge_mdb_configured) {
988 log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
989 return;
990 }
991
463797c1 992 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 993 bool has_ndisc_address = false;
994 NDiscAddress *n;
6accfd31 995
1c09d84e 996 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 997 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 998 return;
39373cb9 999 }
6accfd31 1000
463797c1 1001 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 1002 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1003 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 1004 return;
39373cb9 1005 }
6accfd31 1006
90e74a66 1007 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 1008 if (!n->marked) {
1009 has_ndisc_address = true;
1010 break;
1011 }
1012
15797d6a 1013 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 1014 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW		 1015 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
1016 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 1017 return;
1018 }
1019
1633c457 1020 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 1021 if (!link->dhcp4_configured &&
1022 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
1023 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 1024 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 1025 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 1026 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
1027 * an IPv4ll fallback address must be configured. */
1028 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
1029 return;
1030 }
1031
d98c546d 1032 log_link_debug(link, "%s(): dhcp4:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
39373cb9
YW		 1033 __func__,
1034 yes_no(link->dhcp4_configured),
1035 yes_no(link->dhcp6_address_configured),
1036 yes_no(link->dhcp6_route_configured),
1037 yes_no(link->dhcp6_pd_address_configured),
1038 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 1039 yes_no(link->ndisc_addresses_configured),
1040 yes_no(link->ndisc_routes_configured));
39373cb9 1041 }
463797c1 1042 }
6accfd31 1043
5f58af25 1044 link_enter_configured(link);
6accfd31
DA		 1045
1046 return;
1047}
1048
682c65b0 1049static int link_set_static_configs(Link *link) {
f882c247
TG		 1050 int r;
1051
1052 assert(link);
1053 assert(link->network);
f5be5601 1054 assert(link->state != _LINK_STATE_INVALID);
f882c247 1055
2428613f 1056 /* Reset all *_configured flags we are configuring. */
9b966cee 1057 link->request_static_addresses = false;
2428613f 1058 link->addresses_configured = false;
6aa5773b 1059 link->addresses_ready = false;
2428613f
YW		 1060 link->neighbors_configured = false;
1061 link->static_routes_configured = false;
c16c7808 1062 link->static_nexthops_configured = false;
2428613f
YW		 1063 link->routing_policy_rules_configured = false;
1064
f6bb7ac5
TJ		 1065 r = link_set_bridge_fdb(link);
1066 if (r < 0)
1067 return r;
1068
1f241589
YW		 1069 r = link_set_bridge_mdb(link);
1070 if (r < 0)
1071 return r;
1072
58f1fe9a 1073 r = link_set_neighbors(link);
f3ef324d
YW		 1074 if (r < 0)
1075 return r;
e4a71bf3 1076
682c65b0
YW		 1077 r = link_set_addresses(link);
1078 if (r < 0)
1079 return r;
bd6379ec 1080
fe2bc17c
YW		 1081 r = link_set_address_labels(link);
1082 if (r < 0)
1083 return r;
f882c247 1084
e5526518 1085 /* now that we can figure out a default address for the dhcp server, start it */
708c425d 1086 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1087 r = dhcp4_server_configure(link);
4ff296b0 1088 if (r < 0)
d4cdbea5 1089 return r;
6a7a4e4d 1090 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1091 }
1092
f882c247
TG		 1093 return 0;
1094}
1095
13b498f9 1096static int link_set_bridge_vlan(Link *link) {
86e2be7b 1097 int r;
13b498f9
TJ		 1098
1099 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1100 if (r < 0)
1101 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1102
1103 return r;
1104}
1105
a60a720c 1106static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1107 int r;
1108
1109 if (!link_proxy_arp_enabled(link))
1110 return 0;
1111
62e021a9 1112 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1113 if (r < 0)
1114 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1115
1116 return 0;
1117}
1118
3a390124 1119static int link_configure_continue(Link *link);
55dc8c4a 1120
302a796f 1121static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1122 int r;
1123
1124 assert(m);
1125 assert(link);
1126 assert(link->ifname);
1127
55dc8c4a
YW		 1128 link->setting_mtu = false;
1129
5da8149f 1130 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1131 return 1;
1132
1c4baffc 1133 r = sd_netlink_message_get_errno(m);
4ff296b0 1134 if (r < 0)
5ecb131d 1135 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1136 else
1137 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1138
4ff296b0 1139 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1140 r = link_configure_continue(link);
4ff296b0
YW		 1141 if (r < 0)
1142 link_enter_failed(link);
1143 }
4f882b2a
TG		 1144
1145 return 1;
1146}
1147
933c70a0 1148int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1149 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1150 int r;
1151
1152 assert(link);
1153 assert(link->manager);
1154 assert(link->manager->rtnl);
1155
40288ece
YW		 1156 if (mtu == 0 || link->setting_mtu)
1157 return 0;
1158
933c70a0 1159 if (link->mtu == mtu)
ee493106
YW		 1160 return 0;
1161
6a7a4e4d 1162 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1163
6a7a4e4d
LP		 1164 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1165 if (r < 0)
1166 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1167
44b598a1 1168 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1169 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1170 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1171
1172 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1173 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1174
72c2500b 1175 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1176 }
1177
1c4baffc 1178 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1179 if (r < 0)
1180 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1181
302a796f
YW		 1182 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1183 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1184 if (r < 0)
1185 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1186
ae941762 1187 link_ref(link);
1046bf9b 1188 link->setting_mtu = true;
b226d99b 1189
4f882b2a
TG		 1190 return 0;
1191}
1192
f6fcc1c2
YW		 1193static bool link_reduces_vlan_mtu(Link *link) {
1194 /* See netif_reduces_vlan_mtu() in kernel. */
1195 return streq_ptr(link->kind, "macsec");
1196}
1197
1198static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1199 uint32_t mtu = 0;
1200 NetDev *dev;
f6fcc1c2 1201
90e74a66 1202 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1203 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1204 /* See vlan_dev_change_mtu() in kernel. */
1205 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1206
1207 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1208 /* See macvlan_change_mtu() in kernel. */
1209 mtu = dev->mtu;
1210
1211 return mtu;
1212}
1213
1214static int link_configure_mtu(Link *link) {
1215 uint32_t mtu;
1216
1217 assert(link);
1218 assert(link->network);
1219
1220 if (link->network->mtu > 0)
1221 return link_set_mtu(link, link->network->mtu);
1222
1223 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1224 if (link->mtu >= mtu)
1225 return 0;
1226
1227 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1228 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1229 link->mtu, mtu);
1230
1231 return link_set_mtu(link, mtu);
1232}
1233
302a796f 1234static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1235 int r;
1236
1237 assert(m);
1238 assert(link);
1239 assert(link->ifname);
1240
1241 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1242 return 1;
1243
1244 r = sd_netlink_message_get_errno(m);
1245 if (r < 0)
5ecb131d 1246 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1247
1248 return 1;
1249}
1250
1251static int link_set_flags(Link *link) {
1252 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1253 unsigned ifi_change = 0;
1254 unsigned ifi_flags = 0;
1255 int r;
1256
1257 assert(link);
1258 assert(link->manager);
1259 assert(link->manager->rtnl);
1260
1261 if (link->flags & IFF_LOOPBACK)
1262 return 0;
1263
1264 if (!link->network)
1265 return 0;
1266
866e6b7a 1267 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1268 return 0;
1269
1270 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1271 if (r < 0)
1272 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1273
1274 if (link->network->arp >= 0) {
1275 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1276 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1277 }
1278
1279 if (link->network->multicast >= 0) {
1280 ifi_change |= IFF_MULTICAST;
1281 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1282 }
1283
866e6b7a
SS		 1284 if (link->network->allmulticast >= 0) {
1285 ifi_change |= IFF_ALLMULTI;
1286 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1287 }
1288
99d2baa2
SS		 1289 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1290 if (r < 0)
1291 return log_link_error_errno(link, r, "Could not set link flags: %m");
1292
302a796f
YW		 1293 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1294 link_netlink_destroy_callback, link);
99d2baa2
SS		 1295 if (r < 0)
1296 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1297
1298 link_ref(link);
1299
1300 return 0;
1301}
1302
e7ab854c
TG		 1303static int link_acquire_ipv6_conf(Link *link) {
1304 int r;
1305
1306 assert(link);
1307
e7ab854c 1308 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1309 assert(link->ndisc);
e7ab854c
TG		 1310
1311 log_link_debug(link, "Discovering IPv6 routers");
1312
1e7a0e21 1313 r = sd_ndisc_start(link->ndisc);
63348d13 1314 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1315 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1316 }
1317
7465dd22
PF		 1318 if (link_radv_enabled(link)) {
1319 assert(link->radv);
1320 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1321
1322 log_link_debug(link, "Starting IPv6 Router Advertisements");
1323
fd3ef936
YW		 1324 r = radv_emit_dns(link);
1325 if (r < 0)
1326 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1327
7465dd22
PF		 1328 r = sd_radv_start(link->radv);
1329 if (r < 0 && r != -EBUSY)
1330 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1331 }
1332
838d39af
SS		 1333 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1334 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1335 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1336 assert(link->dhcp6_client);
1337 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1338
838d39af 1339 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1340 if (r < 0 && r != -EBUSY)
1633c457 1341 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1342 else
1343 log_link_debug(link, "Acquiring DHCPv6 lease");
1344 }
1345
1633c457
YW		 1346 r = dhcp6_request_prefix_delegation(link);
1347 if (r < 0)
1348 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1349
e7ab854c
TG		 1350 return 0;
1351}
1352
6fc25497 1353static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1354 int r;
1355
1356 assert(link);
ff254138
TG		 1357 assert(link->manager);
1358 assert(link->manager->event);
1359
910feb78 1360 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1361 assert(link->ipv4ll);
ff254138 1362
6a7a4e4d 1363 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1364
1365 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1366 if (r < 0)
1367 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1368 }
1369
78c958f8 1370 if (link_dhcp4_enabled(link)) {
eb34d4af 1371 assert(link->dhcp_client);
ff254138 1372
6a7a4e4d 1373 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1374
5c1d3fc9 1375 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1376 if (r < 0)
1377 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1378 }
ff254138 1379
6fc25497
SS		 1380 return 0;
1381}
1382
1383static int link_acquire_conf(Link *link) {
1384 int r;
1385
1386 assert(link);
1387
1388 r = link_acquire_ipv4_conf(link);
1389 if (r < 0)
1390 return r;
1391
3f7cc080 1392 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1393 r = link_acquire_ipv6_conf(link);
1394 if (r < 0)
1395 return r;
1396 }
1397
7272b25e
LP		 1398 if (link_lldp_emit_enabled(link)) {
1399 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1400 if (r < 0)
1401 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1402 }
1403
ff254138
TG		 1404 return 0;
1405}
1406
a61bb41c 1407bool link_has_carrier(Link *link) {
deb2e523
TG		 1408 /* see Documentation/networking/operstates.txt in the kernel sources */
1409
a61bb41c 1410 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1411 return true;
1412
a61bb41c 1413 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1414 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1415 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1416 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1417 return true;
1418
1419 return false;
1420}
1421
0e2fdb83
SS		 1422static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1423 int r;
1424
1425 assert(link);
1426
9524014e
DS		 1427 link->setting_genmode = false;
1428
0e2fdb83
SS		 1429 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1430 return 1;
1431
1432 r = sd_netlink_message_get_errno(m);
1433 if (r < 0)
5ecb131d 1434 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1435 else
1436 log_link_debug(link, "Setting address genmode done.");
1437
1438 if (link->state == LINK_STATE_INITIALIZED) {
1439 r = link_configure_continue(link);
1440 if (r < 0)
1441 link_enter_failed(link);
1442 }
0e2fdb83
SS		 1443
1444 return 1;
1445}
1446
1447static int link_configure_addrgen_mode(Link *link) {
1448 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1449 uint8_t ipv6ll_mode;
1450 int r;
1451
1452 assert(link);
1453 assert(link->network);
1454 assert(link->manager);
1455 assert(link->manager->rtnl);
1456
9524014e 1457 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1458 return 0;
1459
0e2fdb83
SS		 1460 log_link_debug(link, "Setting address genmode for link");
1461
1462 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1463 if (r < 0)
1464 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1465
1466 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1467 if (r < 0)
1468 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1469
1470 r = sd_netlink_message_open_container(req, AF_INET6);
1471 if (r < 0)
1472 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1473
1474 if (!link_ipv6ll_enabled(link))
1475 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1476 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1477 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1478 if (r < 0) {
1479 /* The file may not exist. And even if it exists, when stable_secret is unset,
1480 * reading the file fails with EIO. */
1481 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1482
1483 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1484 } else
1485 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1486 } else
6f6296b9 1487 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1488
1489 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1490 if (r < 0)
1491 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1492
1493 r = sd_netlink_message_close_container(req);
1494 if (r < 0)
1495 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1496
1497 r = sd_netlink_message_close_container(req);
1498 if (r < 0)
1499 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1500
1501 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1502 link_netlink_destroy_callback, link);
1503 if (r < 0)
1504 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1505
1506 link_ref(link);
9524014e 1507 link->setting_genmode = true;
0e2fdb83
SS		 1508
1509 return 0;
1510}
1511
302a796f 1512static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1513 int r;
1514
1746cf2a
TG		 1515 assert(link);
1516
5da8149f 1517 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1518 return 1;
1519
1c4baffc 1520 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1521 if (r < 0)
26d6b214 1522 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1523 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1524
f882c247
TG		 1525 return 1;
1526}
1527
1cc84f3b 1528static int link_up(Link *link) {
4afd3348 1529 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1530 int r;
1531
f882c247 1532 assert(link);
c106cc36 1533 assert(link->network);
f882c247
TG		 1534 assert(link->manager);
1535 assert(link->manager->rtnl);
1536
6a7a4e4d 1537 log_link_debug(link, "Bringing link up");
449f7554 1538
6a7a4e4d
LP		 1539 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1540 if (r < 0)
1541 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1542
2b2d8603 1543 /* set it free if not enslaved with networkd */
6cb955c6 1544 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1545 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1546 if (r < 0)
1547 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1548 }
1549
5d4795f3 1550 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1551 if (r < 0)
1552 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1553
c106cc36 1554 if (link->network->mac) {
1c4baffc 1555 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1556 if (r < 0)
1557 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1558 }
1559
302a796f
YW		 1560 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1561 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1562 if (r < 0)
1563 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1564
b226d99b
TG		 1565 link_ref(link);
1566
f882c247
TG		 1567 return 0;
1568}
1569
302a796f 1570static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1571 int r;
1572
1573 assert(link);
1574
1575 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1576 return 1;
1577
1c4baffc 1578 r = sd_netlink_message_get_errno(m);
0d4ad91d 1579 if (r < 0)
5ecb131d 1580 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1581
1582 return 1;
1583}
1584
8e54db83 1585int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1586 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1587 int r;
1588
1589 assert(link);
1590 assert(link->manager);
1591 assert(link->manager->rtnl);
1592
6a7a4e4d 1593 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1594
1595 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1596 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1597 if (r < 0)
1598 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1599
1600 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1601 if (r < 0)
1602 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1603
8e54db83
YW		 1604 r = netlink_call_async(link->manager->rtnl, NULL, req,
1605 callback ?: link_down_handler,
302a796f 1606 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1607 if (r < 0)
1608 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1609
1610 link_ref(link);
1611
1612 return 0;
1613}
1614
89fe6535
SS		 1615static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1616 int r;
1617
1618 assert(link);
1619
1620 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1621 return 1;
1622
1623 r = sd_netlink_message_get_errno(m);
1624 if (r < 0)
1625 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1626
1627 return 1;
1628}
1629
1630static int link_set_group(Link *link) {
1631 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1632 int r;
1633
1634 assert(link);
1635 assert(link->network);
1636 assert(link->manager);
1637 assert(link->manager->rtnl);
1638
1639 if (link->network->group <= 0)
1640 return 0;
1641
1642 log_link_debug(link, "Setting group");
1643
1644 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1645 if (r < 0)
1646 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1647
1648 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1649 if (r < 0)
1650 return log_link_error_errno(link, r, "Could not set link group: %m");
1651
1652 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1653 link_netlink_destroy_callback, link);
1654 if (r < 0)
1655 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1656
1657 link_ref(link);
1658
1659 return 0;
1660}
1661
0d4ad91d
AR		 1662static int link_handle_bound_to_list(Link *link) {
1663 Link *l;
0d4ad91d
AR		 1664 int r;
1665 bool required_up = false;
1666 bool link_is_up = false;
1667
1668 assert(link);
1669
1670 if (hashmap_isempty(link->bound_to_links))
1671 return 0;
1672
1673 if (link->flags & IFF_UP)
1674 link_is_up = true;
1675
90e74a66 1676 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1677 if (link_has_carrier(l)) {
1678 required_up = true;
1679 break;
1680 }
1681
1682 if (!required_up && link_is_up) {
8e54db83 1683 r = link_down(link, NULL);
0d4ad91d
AR		 1684 if (r < 0)
1685 return r;
1686 } else if (required_up && !link_is_up) {
1687 r = link_up(link);
1688 if (r < 0)
1689 return r;
1690 }
1691
1692 return 0;
1693}
1694
1695static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1696 Link *l;
1697 int r;
1698
1699 assert(link);
1700
1701 if (hashmap_isempty(link->bound_by_links))
1702 return 0;
1703
90e74a66 1704 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1705 r = link_handle_bound_to_list(l);
1706 if (r < 0)
1707 return r;
1708 }
1709
1710 return 0;
1711}
1712
1713static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1714 int r;
1715
1716 assert(link);
1717 assert(carrier);
1718
1719 if (link == carrier)
1720 return 0;
1721
1722 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1723 return 0;
1724
1725 r = hashmap_ensure_allocated(h, NULL);
1726 if (r < 0)
1727 return r;
1728
1729 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1730 if (r < 0)
1731 return r;
1732
1733 return 0;
1734}
1735
1736static int link_new_bound_by_list(Link *link) {
1737 Manager *m;
1738 Link *carrier;
0d4ad91d
AR		 1739 int r;
1740 bool list_updated = false;
1741
1742 assert(link);
1743 assert(link->manager);
1744
1745 m = link->manager;
1746
90e74a66 1747 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1748 if (!carrier->network)
1749 continue;
1750
1751 if (strv_isempty(carrier->network->bind_carrier))
1752 continue;
1753
191a3f16 1754 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1755 r = link_put_carrier(link, carrier, &link->bound_by_links);
1756 if (r < 0)
1757 return r;
1758
1759 list_updated = true;
1760 }
1761 }
1762
1763 if (list_updated)
84de38c5 1764 link_dirty(link);
0d4ad91d 1765
90e74a66 1766 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1767 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1768 if (r < 0)
1769 return r;
1770
84de38c5 1771 link_dirty(carrier);
0d4ad91d
AR		 1772 }
1773
1774 return 0;
1775}
1776
1777static int link_new_bound_to_list(Link *link) {
1778 Manager *m;
1779 Link *carrier;
0d4ad91d
AR		 1780 int r;
1781 bool list_updated = false;
1782
1783 assert(link);
1784 assert(link->manager);
1785
1786 if (!link->network)
1787 return 0;
1788
1789 if (strv_isempty(link->network->bind_carrier))
1790 return 0;
1791
1792 m = link->manager;
1793
90e74a66 1794 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1795 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1796 r = link_put_carrier(link, carrier, &link->bound_to_links);
1797 if (r < 0)
1798 return r;
1799
1800 list_updated = true;
1801 }
1802 }
1803
1804 if (list_updated)
84de38c5 1805 link_dirty(link);
0d4ad91d 1806
90e74a66 1807 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1808 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1809 if (r < 0)
1810 return r;
1811
84de38c5 1812 link_dirty(carrier);
0d4ad91d
AR		 1813 }
1814
1815 return 0;
1816}
1817
1818static int link_new_carrier_maps(Link *link) {
1819 int r;
1820
1821 r = link_new_bound_by_list(link);
1822 if (r < 0)
1823 return r;
1824
1825 r = link_handle_bound_by_list(link);
1826 if (r < 0)
1827 return r;
1828
1829 r = link_new_bound_to_list(link);
1830 if (r < 0)
1831 return r;
1832
1833 r = link_handle_bound_to_list(link);
1834 if (r < 0)
1835 return r;
1836
1837 return 0;
1838}
1839
1840static void link_free_bound_to_list(Link *link) {
1841 Link *bound_to;
0d4ad91d 1842
90e74a66 1843 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 1844 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1845
1846 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1847 link_dirty(bound_to);
0d4ad91d
AR		 1848 }
1849
1850 return;
1851}
1852
1853static void link_free_bound_by_list(Link *link) {
1854 Link *bound_by;
0d4ad91d 1855
90e74a66 1856 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 1857 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1858
1859 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1860 link_dirty(bound_by);
0d4ad91d
AR		 1861 link_handle_bound_to_list(bound_by);
1862 }
1863 }
1864
1865 return;
1866}
1867
1868static void link_free_carrier_maps(Link *link) {
1869 bool list_updated = false;
1870
1871 assert(link);
1872
1873 if (!hashmap_isempty(link->bound_to_links)) {
1874 link_free_bound_to_list(link);
1875 list_updated = true;
1876 }
1877
1878 if (!hashmap_isempty(link->bound_by_links)) {
1879 link_free_bound_by_list(link);
1880 list_updated = true;
1881 }
1882
1883 if (list_updated)
84de38c5 1884 link_dirty(link);
0d4ad91d
AR		 1885
1886 return;
1887}
1888
5f707e12
YW		 1889static int link_append_to_master(Link *link, NetDev *netdev) {
1890 Link *master;
1891 int r;
1892
1893 assert(link);
1894 assert(netdev);
1895
1896 r = link_get(link->manager, netdev->ifindex, &master);
1897 if (r < 0)
1898 return r;
1899
de7fef4b 1900 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1901 if (r <= 0)
5f707e12
YW		 1902 return r;
1903
1904 link_ref(link);
1905 return 0;
1906}
1907
1908static void link_drop_from_master(Link *link, NetDev *netdev) {
1909 Link *master;
1910
1911 assert(link);
1912
1913 if (!link->manager || !netdev)
1914 return;
1915
1916 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1917 return;
1918
1919 link_unref(set_remove(master->slaves, link));
1920}
1921
1922static void link_detach_from_manager(Link *link) {
1923 if (!link || !link->manager)
1924 return;
1925
1926 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1927 link_clean(link);
1928
1929 /* The following must be called at last. */
1930 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1931 link_unref(link);
1932}
1933
0d4ad91d
AR		 1934void link_drop(Link *link) {
1935 if (!link || link->state == LINK_STATE_LINGER)
1936 return;
1937
1938 link_set_state(link, LINK_STATE_LINGER);
1939
1940 link_free_carrier_maps(link);
1941
5f707e12
YW		 1942 if (link->network) {
1943 link_drop_from_master(link, link->network->bridge);
1944 link_drop_from_master(link, link->network->bond);
1945 }
1946
6a7a4e4d 1947 log_link_debug(link, "Link removed");
0d4ad91d 1948
db2f8a2e 1949 (void) unlink(link->state_file);
c4397d94 1950 link_detach_from_manager(link);
0d4ad91d
AR		 1951}
1952
3f265037 1953static int link_joined(Link *link) {
f882c247
TG		 1954 int r;
1955
ef1ba606 1956 assert(link);
f5be5601 1957 assert(link->network);
dd3efc09 1958
0d4ad91d
AR		 1959 if (!hashmap_isempty(link->bound_to_links)) {
1960 r = link_handle_bound_to_list(link);
1961 if (r < 0)
1962 return r;
1963 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1964 r = link_up(link);
1965 if (r < 0) {
1966 link_enter_failed(link);
1967 return r;
1968 }
ef1ba606 1969 }
f882c247 1970
9ed794a3 1971 if (link->network->bridge) {
e1853b00 1972 r = link_set_bridge(link);
6a7a4e4d
LP		 1973 if (r < 0)
1974 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1975
1976 r = link_append_to_master(link, link->network->bridge);
1977 if (r < 0)
1978 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1979 }
1980
eb64b435 1981 if (link->network->bond) {
7fcee284 1982 r = link_set_bond(link);
eb64b435
SS		 1983 if (r < 0)
1984 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1985
45e11abf 1986 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1987 if (r < 0)
1988 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1989 }
1990
ffff9abe
TJ		 1991 if (link->network->use_br_vlan &&
1992 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 1993 r = link_set_bridge_vlan(link);
1994 if (r < 0)
1995 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
1996 }
1997
c1835a42
RM		 1998 /* Skip setting up addresses until it gets carrier,
1999 or it would try to set addresses twice,
2000 which is bad for non-idempotent steps. */
dad2d78e 2001 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2002 return 0;
2003
b425c3ae 2004 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2005 return link_set_static_configs(link);
02b59d57
TG		 2006}
2007
302a796f 2008static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2009 int r;
2010
1746cf2a 2011 assert(link);
ef1ba606 2012 assert(link->network);
34bf3c00 2013 assert(link->enslaving > 0);
02b59d57 2014
313cefa1 2015 link->enslaving--;
52433f6b 2016
5da8149f 2017 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2018 return 1;
2019
1c4baffc 2020 r = sd_netlink_message_get_errno(m);
856f962c 2021 if (r < 0 && r != -EEXIST) {
5ecb131d 2022 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2023 link_enter_failed(link);
2024 return 1;
4ff296b0
YW		 2025 }
2026
2027 log_link_debug(link, "Joined netdev");
02b59d57 2028
34bf3c00 2029 if (link->enslaving == 0) {
4ff296b0
YW		 2030 r = link_joined(link);
2031 if (r < 0)
2032 link_enter_failed(link);
34bf3c00 2033 }
02b59d57
TG		 2034
2035 return 1;
2036}
2037
3f265037 2038static int link_enter_join_netdev(Link *link) {
6a0a2f86 2039 NetDev *netdev;
02b59d57
TG		 2040 int r;
2041
2042 assert(link);
2043 assert(link->network);
bd08ce56 2044 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2045
289e6774 2046 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2047
84de38c5 2048 link_dirty(link);
34bf3c00 2049 link->enslaving = 0;
02b59d57 2050
d9c67ea1 2051 if (link->network->bond) {
cbff7170
TJ		 2052 if (link->network->bond->state == NETDEV_STATE_READY &&
2053 link->network->bond->ifindex == link->master_ifindex)
2054 return link_joined(link);
2055
f2341e0a
LP		 2056 log_struct(LOG_DEBUG,
2057 LOG_LINK_INTERFACE(link),
2058 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2059 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2060
34bf3c00
YW		 2061 link->enslaving++;
2062
f2341e0a 2063 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2064 if (r < 0) {
f2341e0a
LP		 2065 log_struct_errno(LOG_WARNING, r,
2066 LOG_LINK_INTERFACE(link),
2067 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2068 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2069 link_enter_failed(link);
2070 return r;
2071 }
0ad6148e
MO		 2072 }
2073
d9c67ea1 2074 if (link->network->bridge) {
f2341e0a
LP		 2075 log_struct(LOG_DEBUG,
2076 LOG_LINK_INTERFACE(link),
2077 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2078 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2079
34bf3c00
YW		 2080 link->enslaving++;
2081
f2341e0a 2082 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2083 if (r < 0) {
f2341e0a
LP		 2084 log_struct_errno(LOG_WARNING, r,
2085 LOG_LINK_INTERFACE(link),
2086 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2087 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2088 link_enter_failed(link);
2089 return r;
2090 }
52433f6b
TG		 2091 }
2092
6cb955c6
AR		 2093 if (link->network->vrf) {
2094 log_struct(LOG_DEBUG,
2095 LOG_LINK_INTERFACE(link),
2096 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2097 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2098
34bf3c00
YW		 2099 link->enslaving++;
2100
6cb955c6
AR		 2101 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2102 if (r < 0) {
2103 log_struct_errno(LOG_WARNING, r,
2104 LOG_LINK_INTERFACE(link),
2105 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2106 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2107 link_enter_failed(link);
2108 return r;
2109 }
6cb955c6
AR		 2110 }
2111
90e74a66 2112 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 2113
2b6db913
YW		 2114 if (netdev->ifindex > 0)
2115 /* Assume already enslaved. */
a63e5daa 2116 continue;
a63e5daa 2117
7033af49
YW		 2118 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2119 continue;
2120
f2341e0a
LP		 2121 log_struct(LOG_DEBUG,
2122 LOG_LINK_INTERFACE(link),
2123 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2124 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2125
34bf3c00
YW		 2126 link->enslaving++;
2127
f2341e0a 2128 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2129 if (r < 0) {
f2341e0a
LP		 2130 log_struct_errno(LOG_WARNING, r,
2131 LOG_LINK_INTERFACE(link),
2132 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2133 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2134 link_enter_failed(link);
2135 return r;
2136 }
326cb406
SS		 2137 }
2138
34bf3c00
YW		 2139 if (link->enslaving == 0)
2140 return link_joined(link);
2141
ef1ba606
TG		 2142 return 0;
2143}
2144
769d324c 2145static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2146 int r;
2147
765afd5c 2148 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2149 return 0;
2150
765afd5c
LP		 2151 /* We propagate the forwarding flag from one interface to the
2152 * global setting one way. This means: as long as at least one
2153 * interface was configured at any time that had IP forwarding
2154 * enabled the setting will stay on for good. We do this
2155 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2156 * somewhat in sync (see below). */
15dee3f0 2157
62e021a9 2158 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2159 if (r < 0)
765afd5c 2160 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2161
769d324c
LP		 2162 return 0;
2163}
2164
2165static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2166 int r;
2167
765afd5c 2168 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2169 return 0;
2170
61233823 2171 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2172 * packet forwarding setting: either packet forwarding is on
2173 * for all, or off for all. We hence don't bother with a
2174 * per-interface setting, but simply propagate the interface
2175 * flag, if it is set, to the global flag, one-way. Note that
2176 * while IPv4 would allow a per-interface flag, we expose the
2177 * same behaviour there and also propagate the setting from
2178 * one to all, to keep things simple (see above). */
15dee3f0 2179
62e021a9 2180 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2181 if (r < 0)
765afd5c 2182 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2183
2184 return 0;
2185}
2186
49092e22 2187static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2188 IPv6PrivacyExtensions s;
49092e22
SS		 2189 int r;
2190
1f0d9695 2191 s = link_ipv6_privacy_extensions(link);
66a6bd68 2192 if (s < 0)
49092e22
SS		 2193 return 0;
2194
62e021a9 2195 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2196 if (r < 0)
49092e22
SS		 2197 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2198
2199 return 0;
2200}
2201
4f2e437a 2202static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2203 int r;
2204
2205 /* Make this a NOP if IPv6 is not available */
2206 if (!socket_ipv6_is_supported())
2207 return 0;
2208
2209 if (link->flags & IFF_LOOPBACK)
2210 return 0;
2211
d68e2e59
LP		 2212 if (!link->network)
2213 return 0;
2214
62e021a9 2215 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2216 if (r < 0)
fe307276 2217 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2218
2219 return 0;
2220}
2221
8749cbcd 2222static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2223 int r;
2224
2225 /* Make this a NOP if IPv6 is not available */
2226 if (!socket_ipv6_is_supported())
2227 return 0;
2228
2229 if (link->flags & IFF_LOOPBACK)
2230 return 0;
2231
d68e2e59
LP		 2232 if (!link->network)
2233 return 0;
2234
8749cbcd
SS		 2235 if (link->network->ipv6_dad_transmits < 0)
2236 return 0;
2237
62e021a9 2238 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2239 if (r < 0)
8749cbcd 2240 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2241
2242 return 0;
2243}
2244
b69c3180 2245static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2246 int r;
2247
2248 /* Make this a NOP if IPv6 is not available */
2249 if (!socket_ipv6_is_supported())
2250 return 0;
2251
2252 if (link->flags & IFF_LOOPBACK)
2253 return 0;
2254
d68e2e59
LP		 2255 if (!link->network)
2256 return 0;
2257
b69c3180
SS		 2258 if (link->network->ipv6_hop_limit < 0)
2259 return 0;
2260
62e021a9 2261 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2262 if (r < 0)
b69c3180 2263 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2264
2265 return 0;
2266}
2267
11102cba 2268static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2269 int r;
2270
2271 /* Make this a NOP if IPv6 is not available */
2272 if (!socket_ipv6_is_supported())
2273 return 0;
2274
2275 if (link->flags & IFF_LOOPBACK)
2276 return 0;
2277
2278 if (link->network->ipv6_mtu == 0)
2279 return 0;
2280
d236718c
DS		 2281 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2282 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2283 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2284 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2285 link->network->ipv6_mtu = IPV6_MIN_MTU;
2286 }
2287
62e021a9 2288 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2289 if (r < 0) {
2290 if (link->mtu < link->network->ipv6_mtu)
2291 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2292 link->network->ipv6_mtu, link->mtu);
2293 else
2294 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2295 }
2296
2297 link->ipv6_mtu_set = true;
11102cba
SS		 2298
2299 return 0;
2300}
2301
94d76d07
YW		 2302static int link_set_ipv4_accept_local(Link *link) {
2303 int r;
2304
2305 if (link->flags & IFF_LOOPBACK)
2306 return 0;
2307
2308 if (link->network->ipv4_accept_local < 0)
2309 return 0;
2310
2311 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2312 if (r < 0)
2313 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2314
2315 return 0;
2316}
2317
0917a271
DS		 2318static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2319 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2320 sd_netlink_message *addr;
2321 int r;
2322
2323 assert(link);
2324 assert(link->manager);
2325 assert(link->manager->rtnl);
2326
2327 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2328 if (r < 0)
2329 return r;
2330
2331 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2332 if (r < 0)
2333 return r;
2334
2335 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2336 unsigned char flags;
2337 int ifindex;
2338
2339 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2340 if (r < 0) {
2341 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2342 continue;
2343 } else if (link->ifindex != ifindex)
2344 continue;
2345
2346 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2347 if (r < 0) {
2348 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2349 continue;
2350 } else if (!(flags & IFA_F_TENTATIVE))
2351 continue;
2352
2353 log_link_debug(link, "Found tentative ipv6 link-local address");
2354 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2355 }
2356
2357 return 0;
2358}
2359
5e5b137a 2360static int link_drop_foreign_config(Link *link) {
5e5b137a
TG		 2361 int r;
2362
0917a271
DS		 2363 /* The kernel doesn't notify us about tentative addresses;
2364 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2365 if (!link_ipv6ll_enabled(link)) {
2366 r = link_enumerate_ipv6_tentative_addresses(link);
2367 if (r < 0)
2368 return r;
2369 }
2370
f8f2f880
YW		 2371 r = link_drop_foreign_addresses(link);
2372 if (r < 0)
2373 return r;
5e5b137a 2374
59048336
YW		 2375 r = link_drop_foreign_neighbors(link);
2376 if (r < 0)
2377 return r;
d1bdafd2 2378
779804dd 2379 return link_drop_foreign_routes(link);
5e5b137a
TG		 2380}
2381
3104883d 2382static int link_drop_config(Link *link) {
3104883d
SS		 2383 int r;
2384
d7fbb9f5
YW		 2385 r = link_drop_addresses(link);
2386 if (r < 0)
2387 return r;
3104883d 2388
59048336
YW		 2389 r = link_drop_neighbors(link);
2390 if (r < 0)
2391 return r;
d1bdafd2 2392
62f0ea5f
YW		 2393 r = link_drop_routes(link);
2394 if (r < 0)
2395 return r;
3104883d 2396
c69305ff
LP		 2397 ndisc_flush(link);
2398
3104883d
SS		 2399 return 0;
2400}
2401
34658df2
YW		 2402static int link_configure_traffic_control(Link *link) {
2403 TrafficControl *tc;
02b59d57
TG		 2404 int r;
2405
34658df2
YW		 2406 link->tc_configured = false;
2407 link->tc_messages = 0;
4ecdcb07 2408
90e74a66 2409 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section) {
34658df2 2410 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2411 if (r < 0)
2412 return r;
2413 }
2414
34658df2
YW		 2415 if (link->tc_messages == 0)
2416 link->tc_configured = true;
4ecdcb07 2417 else
34658df2 2418 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2419
2420 return 0;
2421}
2422
518cd6b5
SS		 2423static int link_configure_sr_iov(Link *link) {
2424 SRIOV *sr_iov;
518cd6b5
SS		 2425 int r;
2426
2427 link->sr_iov_configured = false;
2428 link->sr_iov_messages = 0;
2429
90e74a66 2430 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section) {
518cd6b5
SS		 2431 r = sr_iov_configure(link, sr_iov);
2432 if (r < 0)
2433 return r;
2434 }
2435
2436 if (link->sr_iov_messages == 0)
2437 link->sr_iov_configured = true;
2438 else
2439 log_link_debug(link, "Configuring SR-IOV");
2440
2441 return 0;
2442}
2443
4ecdcb07
YW		 2444static int link_configure(Link *link) {
2445 int r;
2446
ef1ba606 2447 assert(link);
b22d8a00 2448 assert(link->network);
bd08ce56 2449 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2450
34658df2 2451 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2452 if (r < 0)
2453 return r;
2454
518cd6b5
SS		 2455 r = link_configure_sr_iov(link);
2456 if (r < 0)
2457 return r;
2458
500b96eb 2459 if (link->iftype == ARPHRD_CAN)
93ea7750 2460 return link_configure_can(link);
92c918b0 2461
482efedc
SS		 2462 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2463 * for this interface, then enable IPv6 */
57ad7607 2464 (void) link_update_ipv6_sysctl(link);
482efedc 2465
23d8b221
SS		 2466 r = link_set_proxy_arp(link);
2467 if (r < 0)
2468 return r;
2469
c16b5821 2470 r = link_set_ipv6_proxy_ndp_addresses(link);
a0e5c15d
FK		 2471 if (r < 0)
2472 return r;
2473
769d324c
LP		 2474 r = link_set_ipv4_forward(link);
2475 if (r < 0)
2476 return r;
2477
2478 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2479 if (r < 0)
2480 return r;
2481
49092e22
SS		 2482 r = link_set_ipv6_privacy_extensions(link);
2483 if (r < 0)
2484 return r;
2485
4f2e437a
SS		 2486 r = link_set_ipv6_accept_ra(link);
2487 if (r < 0)
2488 return r;
2489
8749cbcd
SS		 2490 r = link_set_ipv6_dad_transmits(link);
2491 if (r < 0)
2492 return r;
b69c3180
SS		 2493
2494 r = link_set_ipv6_hop_limit(link);
2495 if (r < 0)
2496 return r;
8749cbcd 2497
94d76d07
YW		 2498 r = link_set_ipv4_accept_local(link);
2499 if (r < 0)
2500 return r;
2501
99d2baa2
SS		 2502 r = link_set_flags(link);
2503 if (r < 0)
2504 return r;
2505
89fe6535
SS		 2506 r = link_set_group(link);
2507 if (r < 0)
2508 return r;
2509
910feb78 2510 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2511 r = ipv4ll_configure(link);
eb34d4af
TG		 2512 if (r < 0)
2513 return r;
2514 }
2515
78c958f8 2516 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2517 r = dhcp4_set_promote_secondaries(link);
2518 if (r < 0)
2519 return r;
2520
3c9b8860 2521 r = dhcp4_configure(link);
eb34d4af
TG		 2522 if (r < 0)
2523 return r;
eb34d4af
TG		 2524 }
2525
78c958f8 2526 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2527 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2528 if (r < 0)
2529 return r;
2530
2531 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2532 if (r < 0)
2533 return r;
dd43110f
TG		 2534 }
2535
62379e88
TG		 2536 if (link_dhcp6_enabled(link) ||
2537 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2538 r = dhcp6_configure(link);
2539 if (r < 0)
2540 return r;
2541 }
2542
2543 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2544 r = ndisc_configure(link);
4138fb2c
PF		 2545 if (r < 0)
2546 return r;
2547 }
2548
7465dd22
PF		 2549 if (link_radv_enabled(link)) {
2550 r = radv_configure(link);
2551 if (r < 0)
2552 return r;
2553 }
2554
8e1ad1ea 2555 if (link_lldp_rx_enabled(link)) {
7f853950 2556 r = link_lldp_rx_configure(link);
273eec24
LP		 2557 if (r < 0)
2558 return r;
ce43e484
SS		 2559 }
2560
f6fcc1c2 2561 r = link_configure_mtu(link);
40288ece
YW		 2562 if (r < 0)
2563 return r;
44b598a1 2564
9f6e82e6
YW		 2565 r = link_configure_addrgen_mode(link);
2566 if (r < 0)
2567 return r;
0e2fdb83 2568
051e77ca
SS		 2569 r = link_configure_ipv4_dad(link);
2570 if (r < 0)
2571 return r;
2572
3a390124
DS		 2573 return link_configure_continue(link);
2574}
2575
2576/* The configuration continues in this separate function, instead of
2577 * including this in the above link_configure() function, for two
2578 * reasons:
2579 * 1) some devices reset the link when the mtu is set, which caused
2580 * an infinite loop here in networkd; see:
2581 * https://github.com/systemd/systemd/issues/6593
2582 * https://github.com/systemd/systemd/issues/9831
2583 * 2) if ipv6ll is disabled, then bringing the interface up must be
2584 * delayed until after we get confirmation from the kernel that
2585 * the addr_gen_mode parameter has been set (via netlink), see:
2586 * https://github.com/systemd/systemd/issues/13882
2587 */
2588static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2589 int r;
2590
2591 assert(link);
2592 assert(link->network);
bd08ce56 2593 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2594
9524014e 2595 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2596 return 0;
2597
4c649652
DS		 2598 /* Drop foreign config, but ignore loopback or critical devices.
2599 * We do not want to remove loopback address or addresses used for root NFS. */
2600 if (!(link->flags & IFF_LOOPBACK) &&
2601 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2602 r = link_drop_foreign_config(link);
2603 if (r < 0)
2604 return r;
2605 }
2606
d236718c
DS		 2607 /* The kernel resets ipv6 mtu after changing device mtu;
2608 * we must set this here, after we've set device mtu */
2609 r = link_set_ipv6_mtu(link);
2610 if (r < 0)
2611 return r;
2612
dad2d78e 2613 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2614 r = link_acquire_conf(link);
2615 if (r < 0)
2616 return r;
cc544d5f 2617 }
1e9be60b 2618
3f265037 2619 return link_enter_join_netdev(link);
505f8da7
TG		 2620}
2621
27dfc982
YW		 2622static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
2623 assert(duid);
2624
2625 if (duid->raw_data_len > 0)
2626 return 0;
2627
2628 if (duid->type != DUID_TYPE_UUID)
2629 return -EINVAL;
2630
2631 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
2632 duid->raw_data_len = sizeof(sd_id128_t);
2633
2634 return 1;
2635}
2636
2637int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
2638 Manager *manager = userdata;
2639 const sd_bus_error *e;
2640 const void *a;
2641 size_t sz;
2642 DUID *duid;
2643 Link *link;
2644 int r;
2645
2646 assert(m);
2647 assert(manager);
2648
2649 e = sd_bus_message_get_error(m);
2650 if (e) {
2651 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 2652 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 2653 e->message);
2654 goto configure;
2655 }
2656
2657 r = sd_bus_message_read_array(m, 'y', &a, &sz);
2658 if (r < 0)
2659 goto configure;
2660
2661 if (sz != sizeof(sd_id128_t)) {
ab4dd984 2662 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 2663 goto configure;
2664 }
2665
2666 memcpy(&manager->product_uuid, a, sz);
2667 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
2668 (void) duid_set_uuid(duid, manager->product_uuid);
2669
2670 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
2671
2672configure:
2673 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 2674 link_unref(link);
2675
27dfc982
YW		 2676 r = link_configure(link);
2677 if (r < 0)
4ff296b0 2678 link_enter_failed(link);
27dfc982
YW		 2679 }
2680
2681 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
2682
2683 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
2684 * even if the method fails. */
2685 manager->has_product_uuid = true;
2686
2687 return 1;
2688}
2689
2690static bool link_requires_uuid(Link *link) {
2691 const DUID *duid;
2692
2693 assert(link);
2694 assert(link->manager);
2695 assert(link->network);
2696
2697 duid = link_get_duid(link);
2698 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
2699 return false;
2700
2701 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
2702 return true;
2703
2704 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
2705 return true;
2706
2707 return false;
2708}
2709
2710static int link_configure_duid(Link *link) {
2711 Manager *m;
2712 DUID *duid;
2713 int r;
2714
2715 assert(link);
2716 assert(link->manager);
2717 assert(link->network);
2718
2719 m = link->manager;
2720 duid = link_get_duid(link);
2721
2722 if (!link_requires_uuid(link))
2723 return 1;
2724
2725 if (m->has_product_uuid) {
2726 (void) duid_set_uuid(duid, m->product_uuid);
2727 return 1;
2728 }
2729
2730 if (!m->links_requesting_uuid) {
2731 r = manager_request_product_uuid(m, link);
2732 if (r < 0) {
2733 if (r == -ENOMEM)
2734 return r;
2735
ab4dd984
ZJS		 2736 log_link_warning_errno(link, r,
2737 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 2738 return 1;
2739 }
2740 } else {
2741 r = set_put(m->links_requesting_uuid, link);
2742 if (r < 0)
2743 return log_oom();
39dbd0c7
ZJS		 2744 if (r > 0)
2745 link_ref(link);
27dfc982
YW		 2746
2747 r = set_put(m->duids_requesting_uuid, duid);
2748 if (r < 0)
2749 return log_oom();
2750 }
2751
2752 return 0;
2753}
2754
572b21d9 2755static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 2756 Network *network;
2757 int r;
2758
572b21d9
YW		 2759 if (m) {
2760 _cleanup_strv_free_ char **s = NULL;
2761
2762 r = sd_netlink_message_get_errno(m);
2763 if (r < 0)
2764 return r;
2765
2766 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2767 if (r < 0 && r != -ENODATA)
2768 return r;
2769
2770 strv_free_and_replace(link->alternative_names, s);
2771 }
2772
c643bda5
YW		 2773 r = network_get(link->manager, link->iftype, link->sd_device,
2774 link->ifname, link->alternative_names, link->driver,
2775 &link->mac, &link->permanent_mac,
2776 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2777 if (r == -ENOENT) {
2778 link_enter_unmanaged(link);
2779 return 0;
2780 } else if (r == 0 && network->unmanaged) {
2781 link_enter_unmanaged(link);
2782 return 0;
2783 } else if (r < 0)
2784 return r;
2785
99b8517c 2786 if (link->network == network && !force)
ad932b15
YW		 2787 return 0;
2788
2789 log_link_info(link, "Re-configuring with %s", network->filename);
2790
2791 /* Dropping old .network file */
2792 r = link_stop_clients(link, false);
572b21d9 2793 if (r < 0)
ad932b15 2794 return r;
ad932b15
YW		 2795
2796 if (link_dhcp4_server_enabled(link))
2797 (void) sd_dhcp_server_stop(link->dhcp_server);
2798
2799 r = link_drop_config(link);
2800 if (r < 0)
2801 return r;
2802
2c7b826d 2803 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 2804 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2805 r = link_drop_foreign_config(link);
2806 if (r < 0)
2807 return r;
2808 }
2809
2810 link_free_carrier_maps(link);
2811 link_free_engines(link);
2812 link->network = network_unref(link->network);
2813
2814 /* Then, apply new .network file */
2815 r = network_apply(network, link);
2816 if (r < 0)
2817 return r;
2818
2819 r = link_new_carrier_maps(link);
2820 if (r < 0)
2821 return r;
2822
2823 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 2824 link_dirty(link);
ad932b15
YW		 2825
2826 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2827 * link_configure() is called later asynchronously. */
2828 r = link_configure_duid(link);
2829 if (r <= 0)
2830 return r;
2831
2832 r = link_configure(link);
2833 if (r < 0)
2834 return r;
2835
2836 return 0;
2837}
2838
572b21d9
YW		 2839static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2840 int r;
2841
2842 r = link_reconfigure_internal(link, m, false);
2843 if (r < 0)
2844 link_enter_failed(link);
2845
2846 return 1;
2847}
2848
2849static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2850 int r;
2851
2852 r = link_reconfigure_internal(link, m, true);
2853 if (r < 0)
2854 link_enter_failed(link);
2855
2856 return 1;
2857}
2858
2859int link_reconfigure(Link *link, bool force) {
2860 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2861 int r;
2862
2c0d7ed3
YW		 2863 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
2864 return 0;
2865
572b21d9
YW		 2866 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2867 link->ifindex);
2868 if (r < 0)
2869 return r;
2870
2871 r = netlink_call_async(link->manager->rtnl, NULL, req,
2872 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2873 link_netlink_destroy_callback, link);
2874 if (r < 0)
2875 return r;
2876
2877 link_ref(link);
2878
2879 return 0;
2880}
2881
e6bf7774 2882static int link_initialized_and_synced(Link *link) {
505f8da7 2883 Network *network;
505f8da7
TG		 2884 int r;
2885
2886 assert(link);
2887 assert(link->ifname);
2888 assert(link->manager);
2889
bd08ce56
YW		 2890 /* We may get called either from the asynchronous netlink callback,
2891 * or directly for link_add() if running in a container. See link_add(). */
2892 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2893 return 0;
505f8da7 2894
6a7a4e4d 2895 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2896 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2897
0d4ad91d
AR		 2898 r = link_new_bound_by_list(link);
2899 if (r < 0)
2900 return r;
2901
2902 r = link_handle_bound_by_list(link);
2903 if (r < 0)
2904 return r;
2905
c4a03a56 2906 if (!link->network) {
0894cfe4 2907 r = wifi_get_info(link);
8d968fdd
YW		 2908 if (r < 0)
2909 return r;
2910
c643bda5
YW		 2911 r = network_get(link->manager, link->iftype, link->sd_device,
2912 link->ifname, link->alternative_names, link->driver,
2913 &link->mac, &link->permanent_mac,
2914 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2915 if (r == -ENOENT) {
2916 link_enter_unmanaged(link);
4232cf04 2917 return 0;
a09dc546
DM		 2918 } else if (r == 0 && network->unmanaged) {
2919 link_enter_unmanaged(link);
2920 return 0;
c4a03a56
TG		 2921 } else if (r < 0)
2922 return r;
505f8da7 2923
c4a03a56
TG		 2924 if (link->flags & IFF_LOOPBACK) {
2925 if (network->link_local != ADDRESS_FAMILY_NO)
2926 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2927
c4a03a56
TG		 2928 if (network->dhcp != ADDRESS_FAMILY_NO)
2929 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2930
c4a03a56
TG		 2931 if (network->dhcp_server)
2932 log_link_debug(link, "Ignoring DHCP server for loopback link");
2933 }
bd2efe92 2934
7d342c03 2935 r = network_apply(network, link);
c4a03a56
TG		 2936 if (r < 0)
2937 return r;
2938 }
505f8da7 2939
0d4ad91d
AR		 2940 r = link_new_bound_to_list(link);
2941 if (r < 0)
2942 return r;
2943
27dfc982
YW		 2944 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2945 * link_configure() is called later asynchronously. */
2946 r = link_configure_duid(link);
2947 if (r <= 0)
2948 return r;
2949
a748b692
TG		 2950 r = link_configure(link);
2951 if (r < 0)
2952 return r;
2953
4232cf04 2954 return 0;
505f8da7
TG		 2955}
2956
302a796f 2957static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2958 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2959 int r;
2960
572b21d9
YW		 2961 r = sd_netlink_message_get_errno(m);
2962 if (r < 0) {
40681e5c 2963 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2964 link_enter_failed(link);
2965 return 0;
2966 }
2967
2968 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2969 if (r < 0 && r != -ENODATA) {
2970 link_enter_failed(link);
2971 return 0;
2972 }
2973
2974 strv_free_and_replace(link->alternative_names, s);
2975
4ff296b0
YW		 2976 r = link_initialized_and_synced(link);
2977 if (r < 0)
2978 link_enter_failed(link);
e6bf7774
YW		 2979 return 1;
2980}
2981
51517f9e 2982int link_initialized(Link *link, sd_device *device) {
4afd3348 2983 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2984 int r;
2985
2986 assert(link);
2987 assert(link->manager);
2988 assert(link->manager->rtnl);
2989 assert(device);
2990
8434fd5c 2991 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2992 return 0;
2993
51517f9e 2994 if (link->sd_device)
679b3605
TG		 2995 return 0;
2996
79008bdd 2997 log_link_debug(link, "udev initialized link");
bd08ce56 2998 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2999
51517f9e 3000 link->sd_device = sd_device_ref(device);
4f561e8e 3001
3c9b8860
TG		 3002 /* udev has initialized the link, but we don't know if we have yet
3003 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3004 * when it returns we know that the pending NEWLINKs have already been
3005 * processed and that we are up-to-date */
4f561e8e 3006
3c9b8860
TG		 3007 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3008 link->ifindex);
4f561e8e
TG		 3009 if (r < 0)
3010 return r;
3011
302a796f
YW		 3012 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3013 link_netlink_destroy_callback, link);
4f561e8e
TG		 3014 if (r < 0)
3015 return r;
3016
5da8149f
TG		 3017 link_ref(link);
3018
4f561e8e
TG		 3019 return 0;
3020}
3021
c4a03a56 3022static int link_load(Link *link) {
0bc70f1d
TG		 3023 _cleanup_free_ char *network_file = NULL,
3024 *addresses = NULL,
f703cc2c 3025 *routes = NULL,
0bc70f1d
TG		 3026 *dhcp4_address = NULL,
3027 *ipv4ll_address = NULL;
3028 union in_addr_union address;
c4a03a56
TG		 3029 int r;
3030
3031 assert(link);
3032
aa8fbc74 3033 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3034 "NETWORK_FILE", &network_file,
3035 "ADDRESSES", &addresses,
f703cc2c 3036 "ROUTES", &routes,
0bc70f1d 3037 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3038 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3039 if (r < 0 && r != -ENOENT)
3040 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3041
3042 if (network_file) {
3043 Network *network;
3044 char *suffix;
3045
3046 /* drop suffix */
3047 suffix = strrchr(network_file, '.');
3048 if (!suffix) {
3049 log_link_debug(link, "Failed to get network name from %s", network_file);
3050 goto network_file_fail;
3051 }
3052 *suffix = '\0';
3053
3054 r = network_get_by_name(link->manager, basename(network_file), &network);
3055 if (r < 0) {
3056 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3057 goto network_file_fail;
3058 }
3059
7d342c03 3060 r = network_apply(network, link);
c4a03a56
TG		 3061 if (r < 0)
3062 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3063 }
3064
3065network_file_fail:
3066
da4d3a61
YW		 3067 r = link_deserialize_addresses(link, addresses);
3068 if (r < 0)
3069 log_link_warning_errno(link, r, "Failed to load addresses from %s, ignoring: %m", link->state_file);
74544b4e 3070
731ff05b
YW		 3071 r = link_deserialize_routes(link, routes);
3072 if (r < 0)
3073 log_link_warning_errno(link, r, "Failed to load routes from %s, ignoring: %m", link->state_file);
f703cc2c 3074
0bc70f1d
TG		 3075 if (dhcp4_address) {
3076 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3077 if (r < 0) {
b68d26b8 3078 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3079 goto dhcp4_address_fail;
3080 }
3081
b1c626f6 3082 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3083 if (r < 0)
b68d26b8 3084 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3085
1b43e246
DS		 3086 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3087 if (r < 0)
3088 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3089
0bc70f1d
TG		 3090 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3091 if (r < 0)
b68d26b8 3092 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3093 }
3094
3095dhcp4_address_fail:
3096
3097 if (ipv4ll_address) {
3098 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3099 if (r < 0) {
b68d26b8 3100 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3101 goto ipv4ll_address_fail;
3102 }
3103
3104 r = sd_ipv4ll_new(&link->ipv4ll);
3105 if (r < 0)
b68d26b8 3106 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3107
1b43e246
DS		 3108 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3109 if (r < 0)
3110 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3111
0bc70f1d
TG		 3112 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3113 if (r < 0)
b68d26b8 3114 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3115 }
3116
3117ipv4ll_address_fail:
3118
c4a03a56
TG		 3119 return 0;
3120}
3121
1c4baffc 3122int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3123 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3124 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3125 Link *link;
5a937ea2 3126 int r;
505f8da7
TG		 3127
3128 assert(m);
fbbeb65a 3129 assert(m->rtnl);
505f8da7
TG		 3130 assert(message);
3131 assert(ret);
3132
3133 r = link_new(m, message, ret);
3134 if (r < 0)
3135 return r;
3136
3137 link = *ret;
3138
6a7a4e4d 3139 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3140
c4a03a56
TG		 3141 r = link_load(link);
3142 if (r < 0)
3143 return r;
3144
bf331d87
YW		 3145 if (path_is_read_only_fs("/sys") <= 0) {
3146 /* udev should be around */
ae06ab10 3147 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3148 r = sd_device_new_from_device_id(&device, ifindex_str);
3149 if (r < 0) {
4d59e14f
YW		 3150 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3151 return 0;
5c416fc4 3152 }
505f8da7 3153
5a937ea2 3154 r = sd_device_get_is_initialized(device);
51517f9e 3155 if (r < 0) {
bf331d87 3156 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3157 goto failed;
3158 }
5a937ea2 3159 if (r == 0) {
505f8da7 3160 /* not yet ready */
79008bdd 3161 log_link_debug(link, "link pending udev initialization...");
505f8da7 3162 return 0;
3c4cb064 3163 }
505f8da7 3164
299ad32d
YW		 3165 r = device_is_renaming(device);
3166 if (r < 0) {
bf331d87 3167 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3168 goto failed;
3169 }
3170 if (r > 0) {
bf331d87 3171 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3172 return 0;
3173 }
3174
4f561e8e
TG		 3175 r = link_initialized(link, device);
3176 if (r < 0)
5c416fc4 3177 goto failed;
4f561e8e 3178 } else {
e6bf7774 3179 r = link_initialized_and_synced(link);
4f561e8e 3180 if (r < 0)
5c416fc4 3181 goto failed;
4f561e8e 3182 }
505f8da7 3183
a748b692 3184 return 0;
5c416fc4
TG		 3185failed:
3186 link_enter_failed(link);
3187 return r;
a748b692
TG		 3188}
3189
c601ebf7 3190int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3191 int r;
3192
3193 assert(link);
3194
3195 log_link_info(link, "Gained IPv6LL");
3196
c601ebf7 3197 link->ipv6ll_address = *address;
e7ab854c
TG		 3198 link_check_ready(link);
3199
b9ea3d2e 3200 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3201 r = link_acquire_ipv6_conf(link);
3202 if (r < 0) {
3203 link_enter_failed(link);
3204 return r;
3205 }
3206 }
3207
3208 return 0;
3209}
3210
9c0a72f9
TG		 3211static int link_carrier_gained(Link *link) {
3212 int r;
3213
3214 assert(link);
3215
0894cfe4 3216 r = wifi_get_info(link);
8d968fdd
YW		 3217 if (r < 0)
3218 return r;
3219 if (r > 0) {
572b21d9
YW		 3220 r = link_reconfigure_internal(link, NULL, false);
3221 if (r < 0) {
3222 link_enter_failed(link);
8d968fdd 3223 return r;
572b21d9 3224 }
8d968fdd
YW		 3225 }
3226
b9ea3d2e 3227 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3228 r = link_acquire_conf(link);
3229 if (r < 0) {
3230 link_enter_failed(link);
3231 return r;
3232 }
6fc25497 3233
b425c3ae 3234 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 3235 r = link_set_static_configs(link);
6fc25497
SS		 3236 if (r < 0)
3237 return r;
9c0a72f9
TG		 3238 }
3239
0d4ad91d
AR		 3240 r = link_handle_bound_by_list(link);
3241 if (r < 0)
3242 return r;
3243
1f241589
YW		 3244 if (!link->bridge_mdb_configured) {
3245 r = link_set_bridge_mdb(link);
3246 if (r < 0)
3247 return r;
3248 }
3249
3250 if (streq_ptr(link->kind, "bridge")) {
3251 Link *slave;
3252
3253 SET_FOREACH(slave, link->slaves) {
3254 if (slave->bridge_mdb_configured)
3255 continue;
3256
3257 r = link_set_bridge_mdb(slave);
3258 if (r < 0)
3259 link_enter_failed(slave);
3260 }
3261 }
3db468ea 3262
9c0a72f9
TG		 3263 return 0;
3264}
3265
3266static int link_carrier_lost(Link *link) {
3267 int r;
3268
3269 assert(link);
3270
25e992ba 3271 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3272 return 0;
3273
fbdb6605 3274 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3275 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3276 * configuration and stop the clients as well. */
97e7fb39
SS		 3277 if (link->setting_mtu)
3278 return 0;
3279
95355a28 3280 r = link_stop_clients(link, false);
9c0a72f9
TG		 3281 if (r < 0) {
3282 link_enter_failed(link);
3283 return r;
3284 }
3285
28464ae0
SS		 3286 if (link_dhcp4_server_enabled(link))
3287 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3288
3104883d
SS		 3289 r = link_drop_config(link);
3290 if (r < 0)
3291 return r;
3292
2c7b826d 3293 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3294 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3295 r = link_drop_foreign_config(link);
3296 if (r < 0)
3297 return r;
3298 }
3104883d 3299
0d4ad91d
AR		 3300 r = link_handle_bound_by_list(link);
3301 if (r < 0)
3302 return r;
3303
9c0a72f9
TG		 3304 return 0;
3305}
3306
3307int link_carrier_reset(Link *link) {
3308 int r;
3309
3310 assert(link);
3311
3312 if (link_has_carrier(link)) {
3313 r = link_carrier_lost(link);
3314 if (r < 0)
3315 return r;
3316
3317 r = link_carrier_gained(link);
3318 if (r < 0)
3319 return r;
3320
6a7a4e4d 3321 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3322 }
3323
3324 return 0;
3325}
3326
d236718c
DS		 3327/* This is called every time an interface admin state changes to up;
3328 * specifically, when IFF_UP flag changes from unset to set */
3329static int link_admin_state_up(Link *link) {
3330 int r;
3331
3332 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3333 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3334 * ipv6_mtu_set prevents this from trying to set it too early before
3335 * the link->network has been setup; we only need to reset it
3336 * here if we've already set it during normal initialization. */
3337 if (link->ipv6_mtu_set) {
3338 r = link_set_ipv6_mtu(link);
3339 if (r < 0)
3340 return r;
3341 }
3342
3343 return 0;
3344}
3345
1c4baffc 3346int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3347 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3348 struct ether_addr mac;
ca4e095a 3349 const char *ifname;
afe7fd56 3350 uint32_t mtu;
d236718c 3351 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3352 int old_master, r;
22936833 3353
dd3efc09 3354 assert(link);
b8941f74 3355 assert(link->ifname);
22936833
TG		 3356 assert(m);
3357
7619683b 3358 if (link->state == LINK_STATE_LINGER) {
5238e957 3359 log_link_info(link, "Link re-added");
289e6774 3360 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3361
3362 r = link_new_carrier_maps(link);
3363 if (r < 0)
3364 return r;
7619683b
TG		 3365 }
3366
1c4baffc 3367 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3368 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3369 Manager *manager = link->manager;
b8941f74 3370
30de2b89 3371 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3372
30de2b89
YW		 3373 link_drop(link);
3374 r = link_add(manager, m, &link);
3375 if (r < 0)
3376 return r;
b8941f74
TG		 3377 }
3378
572b21d9
YW		 3379 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3380 if (r >= 0)
3381 strv_free_and_replace(link->alternative_names, s);
3382
1c4baffc 3383 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3384 if (r >= 0 && mtu > 0) {
3385 link->mtu = mtu;
4e964aa0 3386 if (link->original_mtu == 0) {
afe7fd56 3387 link->original_mtu = mtu;
6a7a4e4d 3388 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3389 }
3390
3391 if (link->dhcp_client) {
3c9b8860
TG		 3392 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3393 link->mtu);
fc95c359
YW		 3394 if (r < 0)
3395 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3396 }
7465dd22
PF		 3397
3398 if (link->radv) {
3399 r = sd_radv_set_mtu(link->radv, link->mtu);
3400 if (r < 0)
3401 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3402 }
9842de0d 3403 }
69629de9 3404
e9189a1f
TG		 3405 /* The kernel may broadcast NEWLINK messages without the MAC address
3406 set, simply ignore them. */
1c4baffc 3407 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW		 3408 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
3409
3410 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
3411
3412 log_link_debug(link, "Gained new MAC address: "
3413 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3414 mac.ether_addr_octet[0],
3415 mac.ether_addr_octet[1],
3416 mac.ether_addr_octet[2],
3417 mac.ether_addr_octet[3],
3418 mac.ether_addr_octet[4],
3419 mac.ether_addr_octet[5]);
3420
3421 if (link->ipv4ll) {
3422 bool restart = sd_ipv4ll_is_running(link->ipv4ll) > 0;
3423
3424 if (restart) {
3425 r = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 3426 if (r < 0)
807667f7 3427 return log_link_warning_errno(link, r, "Could not stop IPv4LL client: %m");
c49b33ac 3428 }
c49b33ac 3429
807667f7
YW		 3430 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3431 if (r < 0)
3432 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3433
3434 if (restart) {
3435 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d 3436 if (r < 0)
807667f7
YW		 3437 return log_link_warning_errno(link, r, "Could not restart IPv4LL client: %m");
3438 }
3439 }
3440
3441 if (link->dhcp_client) {
3442 r = sd_dhcp_client_set_mac(link->dhcp_client,
3443 (const uint8_t *) &link->mac,
3444 sizeof (link->mac),
3445 ARPHRD_ETHER);
3446 if (r < 0)
3447 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3448
3449 r = dhcp4_set_client_identifier(link);
3450 if (r < 0)
3451 return log_link_warning_errno(link, r, "Could not set DHCP client identifier: %m");
3452 }
413708d1 3453
807667f7
YW		 3454 if (link->dhcp6_client) {
3455 const DUID* duid = link_get_duid(link);
3456 bool restart = sd_dhcp6_client_is_running(link->dhcp6_client) > 0;
3457
3458 if (restart) {
3459 r = sd_dhcp6_client_stop(link->dhcp6_client);
fff1f40c 3460 if (r < 0)
807667f7 3461 return log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m");
c49b33ac 3462 }
4138fb2c 3463
807667f7
YW		 3464 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3465 (const uint8_t *) &link->mac,
3466 sizeof (link->mac),
3467 ARPHRD_ETHER);
3468 if (r < 0)
3469 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
8341a5c3 3470
807667f7
YW		 3471 if (link->network->iaid_set) {
3472 r = sd_dhcp6_client_set_iaid(link->dhcp6_client, link->network->iaid);
6a7a4e4d 3473 if (r < 0)
807667f7
YW		 3474 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
3475 }
3476
3477 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
3478 duid->type,
3479 duid->raw_data_len > 0 ? duid->raw_data : NULL,
3480 duid->raw_data_len);
3481 if (r < 0)
3482 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
3483
3484 if (restart) {
3485 r = sd_dhcp6_client_start(link->dhcp6_client);
413708d1 3486 if (r < 0)
807667f7 3487 return log_link_warning_errno(link, r, "Could not restart DHCPv6 client: %m");
4138fb2c 3488 }
807667f7 3489 }
7465dd22 3490
807667f7
YW		 3491 if (link->radv) {
3492 bool restart = sd_radv_is_running(link->radv);
3493
3494 if (restart) {
3495 r = sd_radv_stop(link->radv);
7465dd22 3496 if (r < 0)
807667f7 3497 return log_link_warning_errno(link, r, "Could not stop Router Advertisement: %m");
7465dd22 3498 }
420d2058 3499
807667f7
YW		 3500 r = sd_radv_set_mac(link->radv, &link->mac);
3501 if (r < 0)
3502 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
3503
3504 if (restart) {
3505 r = sd_radv_start(link->radv);
420d2058 3506 if (r < 0)
807667f7 3507 return log_link_warning_errno(link, r, "Could not restart Router Advertisement: %m");
420d2058 3508 }
c49b33ac 3509 }
807667f7
YW		 3510
3511 if (link->ndisc) {
3512 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
3513 if (r < 0)
3514 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
3515 }
4f882b2a
TG		 3516 }
3517
bb262ef0
YW		 3518 old_master = link->master_ifindex;
3519 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3520
d236718c 3521 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 3522 had_carrier = link_has_carrier(link);
3523
bb262ef0 3524 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3525 if (r < 0)
3526 return r;
3527
d236718c
DS		 3528 if (!link_was_admin_up && (link->flags & IFF_UP)) {
3529 log_link_info(link, "Link UP");
3530
3531 r = link_admin_state_up(link);
3532 if (r < 0)
3533 return r;
3534 } else if (link_was_admin_up && !(link->flags & IFF_UP))
3535 log_link_info(link, "Link DOWN");
3536
273eec24
LP		 3537 r = link_update_lldp(link);
3538 if (r < 0)
3539 return r;
3540
a61bb41c
TG		 3541 carrier_gained = !had_carrier && link_has_carrier(link);
3542 carrier_lost = had_carrier && !link_has_carrier(link);
3543
3544 if (carrier_gained) {
6a7a4e4d 3545 log_link_info(link, "Gained carrier");
a61bb41c 3546
9c0a72f9
TG		 3547 r = link_carrier_gained(link);
3548 if (r < 0)
3549 return r;
a61bb41c 3550 } else if (carrier_lost) {
6a7a4e4d 3551 log_link_info(link, "Lost carrier");
a61bb41c 3552
9c0a72f9
TG		 3553 r = link_carrier_lost(link);
3554 if (r < 0)
a61bb41c 3555 return r;
a61bb41c
TG		 3556 }
3557
3558 return 0;
dd3efc09 3559}
fe8db0c5 3560
b295beea
LP		 3561static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
3562 bool space = false;
b295beea
LP		 3563 Link *link;
3564
3565 assert(f);
3566 assert(prefix);
3567
3568 if (hashmap_isempty(h))
3569 return;
3570
0d536673 3571 fputs(prefix, f);
90e74a66 3572 HASHMAP_FOREACH(link, h) {
b295beea 3573 if (space)
0d536673 3574 fputc(' ', f);
b295beea
LP		 3575
3576 fprintf(f, "%i", link->ifindex);
3577 space = true;
3578 }
3579
0d536673 3580 fputc('\n', f);
b295beea
LP		 3581}
3582
64581765 3583static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 3584 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 3585 const char *str;
15761549 3586
64581765
YW		 3587 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
3588 continue;
3589
e77bd3fd
YW		 3590 str = in_addr_full_to_string(dns[j]);
3591 if (!str)
15761549 3592 continue;
15761549
YW		 3593
3594 if (*space)
3595 fputc(' ', f);
e77bd3fd 3596 fputs(str, f);
15761549
YW		 3597 *space = true;
3598 }
3599}
3600
d5e172d2
ZJS		 3601static void serialize_addresses(
3602 FILE *f,
3603 const char *lvalue,
3604 bool *space,
3605 char **addresses,
3606 sd_dhcp_lease *lease,
3607 bool conditional,
ddb82ec2 3608 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 3609 sd_dhcp6_lease *lease6,
3610 bool conditional6,
3611 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
3612 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
3613 int r;
3614
3615 bool _space = false;
3616 if (!space)
3617 space = &_space;
3618
3619 if (lvalue)
3620 fprintf(f, "%s=", lvalue);
3621 fputstrv(f, addresses, NULL, space);
3622
3623 if (lease && conditional) {
3624 const struct in_addr *lease_addresses;
3625
3626 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
3627 if (r > 0)
d8bff5cc 3628 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 3629 }
3630
3631 if (lease6 && conditional6 && lease6_get_addr) {
3632 const struct in6_addr *in6_addrs;
3633
3634 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 3635 if (r > 0)
3636 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 3637 }
3638
3639 if (lease6 && conditional6 && lease6_get_fqdn) {
3640 char **in6_hosts;
3641
3642 r = lease6_get_fqdn(lease6, &in6_hosts);
3643 if (r > 0)
3644 fputstrv(f, in6_hosts, NULL, space);
3645 }
3646
3647 if (lvalue)
3648 fputc('\n', f);
3649}
3650
fe8db0c5 3651int link_save(Link *link) {
d361b373 3652 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 3653 _cleanup_free_ char *temp_path = NULL;
fe8db0c5
TG		 3654 _cleanup_fclose_ FILE *f = NULL;
3655 int r;
3656
3657 assert(link);
3658 assert(link->state_file);
68a8723c 3659 assert(link->lease_file);
bbf7c048
TG		 3660 assert(link->manager);
3661
370e9930 3662 if (link->state == LINK_STATE_LINGER) {
6990fb6b 3663 (void) unlink(link->state_file);
370e9930
TG		 3664 return 0;
3665 }
3666
34437b4f
LP		 3667 link_lldp_save(link);
3668
deb2e523
TG		 3669 admin_state = link_state_to_string(link->state);
3670 assert(admin_state);
3671
e375dcde
TG		 3672 oper_state = link_operstate_to_string(link->operstate);
3673 assert(oper_state);
deb2e523 3674
ac999bf0
YW		 3675 carrier_state = link_carrier_state_to_string(link->carrier_state);
3676 assert(carrier_state);
3677
3678 address_state = link_address_state_to_string(link->address_state);
3679 assert(address_state);
3680
fe8db0c5
TG		 3681 r = fopen_temporary(link->state_file, &f, &temp_path);
3682 if (r < 0)
6a7a4e4d 3683 goto fail;
fe8db0c5 3684
5512a963 3685 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 3686
3687 fprintf(f,
3688 "# This is private data. Do not parse.\n"
deb2e523 3689 "ADMIN_STATE=%s\n"
ac999bf0
YW		 3690 "OPER_STATE=%s\n"
3691 "CARRIER_STATE=%s\n"
3692 "ADDRESS_STATE=%s\n",
3693 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 3694
bcb7a07e 3695 if (link->network) {
fe0e16db
YW		 3696 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
3697 const char *dhcp_domainname = NULL, *p;
fe0e16db 3698 bool space;
07bdc70d 3699
c1a38904
MTL		 3700 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
3701 yes_no(link->network->required_for_online));
3702
d5e172d2
ZJS		 3703 LinkOperationalStateRange st = link->network->required_operstate_for_online;
3704 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
3705 strempty(link_operstate_to_string(st.min)),
3706 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
3707 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 3708
adc5b2e2
TG		 3709 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
3710
d5e172d2
ZJS		 3711 /************************************************************/
3712
0d536673 3713 fputs("DNS=", f);
ea352b40 3714 space = false;
15761549 3715 if (link->n_dns != (unsigned) -1)
64581765 3716 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 3717 else
64581765 3718 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 3719
d5e172d2
ZJS		 3720 serialize_addresses(f, NULL, &space,
3721 NULL,
3722 link->dhcp_lease,
3723 link->network->dhcp_use_dns,
ddb82ec2 3724 SD_DHCP_LEASE_DNS,
1633c457 3725 link->dhcp6_lease,
d5e172d2
ZJS		 3726 link->network->dhcp6_use_dns,
3727 sd_dhcp6_lease_get_dns,
3728 NULL);
1e7a0e21 3729
a8c10331 3730 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 3731 ndisc_vacuum(link);
3732
b296797f 3733 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3734 NDiscRDNSS *dd;
3735
90e74a66 3736 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 3737 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 3738 }
3739
3740 fputc('\n', f);
3741
d5e172d2
ZJS		 3742 /************************************************************/
3743
3744 serialize_addresses(f, "NTP", NULL,
3745 link->ntp ?: link->network->ntp,
3746 link->dhcp_lease,
3747 link->network->dhcp_use_ntp,
ddb82ec2 3748 SD_DHCP_LEASE_NTP,
1633c457 3749 link->dhcp6_lease,
d5e172d2
ZJS		 3750 link->network->dhcp6_use_ntp,
3751 sd_dhcp6_lease_get_ntp_addrs,
3752 sd_dhcp6_lease_get_ntp_fqdn);
3753
3754 serialize_addresses(f, "SIP", NULL,
2a71d57f 3755 NULL,
d5e172d2
ZJS		 3756 link->dhcp_lease,
3757 link->network->dhcp_use_sip,
ddb82ec2 3758 SD_DHCP_LEASE_SIP,
2a71d57f 3759 NULL, false, NULL, NULL);
d5e172d2
ZJS		 3760
3761 /************************************************************/
bd8f6538 3762
b2a81c0b 3763 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3764 if (link->dhcp_lease) {
b2a81c0b 3765 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3766 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3767 }
1633c457
YW		 3768 if (link->dhcp6_lease)
3769 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3770 }
3771
fe0e16db
YW		 3772 fputs("DOMAINS=", f);
3773 space = false;
90e74a66 3774 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 3775 fputs_with_space(f, p, NULL, &space);
07bdc70d 3776
1e7a0e21 3777 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3778 if (dhcp_domainname)
3779 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3780 if (dhcp_domains)
3781 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3782 if (dhcp6_domains)
3783 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3784 }
3785
3786 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3787 NDiscDNSSL *dd;
1e7a0e21 3788
90e74a66 3789 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3790 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3791 }
b2a81c0b 3792
0d536673 3793 fputc('\n', f);
6192b846 3794
d5e172d2
ZJS		 3795 /************************************************************/
3796
fe0e16db
YW		 3797 fputs("ROUTE_DOMAINS=", f);
3798 space = false;
90e74a66 3799 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 3800 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3801
1e7a0e21 3802 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3803 if (dhcp_domainname)
3804 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3805 if (dhcp_domains)
3806 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3807 if (dhcp6_domains)
3808 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3809 }
3810
3811 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3812 NDiscDNSSL *dd;
1e7a0e21 3813
90e74a66 3814 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3815 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3816 }
b2a81c0b 3817
0d536673 3818 fputc('\n', f);
67272d15 3819
d5e172d2
ZJS		 3820 /************************************************************/
3821
3c9b8860 3822 fprintf(f, "LLMNR=%s\n",
15761549 3823 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 3824
3825 /************************************************************/
3826
aaa297d4 3827 fprintf(f, "MDNS=%s\n",
15761549 3828 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 3829
d5e172d2
ZJS		 3830 /************************************************************/
3831
3832 int dns_default_route =
3833 link->dns_default_route >= 0 ? link->dns_default_route :
3834 link->network->dns_default_route;
3835 if (dns_default_route >= 0)
3836 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
3837
3838 /************************************************************/
3839
3840 DnsOverTlsMode dns_over_tls_mode =
3841 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
3842 link->network->dns_over_tls_mode;
3843 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3844 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
3845
3846 /************************************************************/
3847
3848 DnssecMode dnssec_mode =
3849 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
3850 link->network->dnssec_mode;
3851 if (dnssec_mode != _DNSSEC_MODE_INVALID)
3852 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
3853
3854 /************************************************************/
3855
3856 Set *nta_anchors = link->dnssec_negative_trust_anchors;
3857 if (set_isempty(nta_anchors))
3858 nta_anchors = link->network->dnssec_negative_trust_anchors;
3859
3860 if (!set_isempty(nta_anchors)) {
8a516214
LP		 3861 const char *n;
3862
0d536673 3863 fputs("DNSSEC_NTA=", f);
8a516214 3864 space = false;
90e74a66 3865 SET_FOREACH(n, nta_anchors)
d390f8ef 3866 fputs_with_space(f, n, NULL, &space);
0d536673 3867 fputc('\n', f);
8a516214
LP		 3868 }
3869
d5e172d2
ZJS		 3870 /************************************************************/
3871
3b31e2b7
YW		 3872 r = link_serialize_addresses(link, f);
3873 if (r < 0)
3874 goto fail;
c1eb9872 3875
d5e172d2
ZJS		 3876 /************************************************************/
3877
56519412
YW		 3878 r = link_serialize_routes(link, f);
3879 if (r < 0)
3880 goto fail;
bcb7a07e 3881 }
7374f9d8 3882
b295beea
LP		 3883 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3884 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3885
8eb9058d 3886 if (link->dhcp_lease) {
bd91b83e 3887 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3888 if (r < 0)
c2d6bd61 3889 goto fail;
fe8db0c5 3890
7374f9d8 3891 fprintf(f,
b0e39c82
TG		 3892 "DHCP_LEASE=%s\n",
3893 link->lease_file);
deb2e523 3894 } else
6990fb6b 3895 (void) unlink(link->lease_file);
fe8db0c5 3896
0bc70f1d
TG		 3897 if (link->ipv4ll) {
3898 struct in_addr address;
3899
3900 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
3901 if (r >= 0) {
0d536673 3902 fputs("IPV4LL_ADDRESS=", f);
072320ea 3903 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 3904 fputc('\n', f);
0bc70f1d
TG		 3905 }
3906 }
3907
7e738e7b
SS		 3908 if (link->dhcp6_client) {
3909 _cleanup_free_ char *duid = NULL;
3910 uint32_t iaid;
3911
3912 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
3913 if (r >= 0)
3914 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
3915
3916 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
3917 if (r >= 0)
3918 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
3919 }
18d8a2cf 3920
c2d6bd61
LP		 3921 r = fflush_and_check(f);
3922 if (r < 0)
3923 goto fail;
fe8db0c5 3924
c2d6bd61 3925 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3926 r = -errno;
c2d6bd61 3927 goto fail;
fe8db0c5
TG		 3928 }
3929
c2d6bd61 3930 return 0;
dacd6cee 3931
c2d6bd61 3932fail:
6a7a4e4d 3933 (void) unlink(link->state_file);
6a7a4e4d
LP		 3934 if (temp_path)
3935 (void) unlink(temp_path);
3936
dacd6cee 3937 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3938}
3939
84de38c5
TG		 3940/* The serialized state in /run is no longer up-to-date. */
3941void link_dirty(Link *link) {
3942 int r;
3943
3944 assert(link);
3945
0c241a37
SS		 3946 /* mark manager dirty as link is dirty */
3947 manager_dirty(link->manager);
3948
de7fef4b 3949 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 3950 if (r <= 0)
de7fef4b 3951 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 3952 return;
84de38c5
TG		 3953 link_ref(link);
3954}
3955
3956/* The serialized state in /run is up-to-date */
3957void link_clean(Link *link) {
3958 assert(link);
3959 assert(link->manager);
3960
1046bf9b 3961 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3962}
3963
c2a65950
YW		 3964int link_save_and_clean(Link *link) {
3965 int r;
3966
3967 r = link_save(link);
3968 if (r < 0)
3969 return r;
3970
3971 link_clean(link);
3972 return 0;
3973}
3974
fe8db0c5 3975static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3976 [LINK_STATE_PENDING] = "pending",
bd08ce56 3977 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3978 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3979 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3980 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3981 [LINK_STATE_FAILED] = "failed",
370e9930 3982 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3983};
3984
3985DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 3986
3987int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
3988 const char *err_msg = NULL;
3989
3990 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 3991 return log_link_full_errno(link, level, err,
3992 "%s: %s%s%s%m",
3993 msg,
3994 strempty(err_msg),
3995 err_msg && !endswith(err_msg, ".") ? "." : "",
3996 err_msg ? " " : "");
5ecb131d 3997}
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